Hubble Crossword 64 - Annotated solution

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ACROSS

1 One leading cheers as Tom tears about holding first of trophies (11) 
TOASTMASTER - One leading cheers (def) from AS TOM TEARS* (about) holding T (first of trophies)

9 Drugs one had during surgical procedures (7) 
OPIATES - Drugs (def) from I ATE (one had) during OPS (surgical procedures)
 
10 Composition of "Farewell" involving no little volume (7) 
TOCCATA - Composition (def) from TATA (Farewell) involving O (no) CC (little volume)

11 Two on board measure final toll (5) 
KNELL - final toll (def) from K (king) N (knight) (two on board) ELL (measure)
 
12 Item being sent back as part of Internet cafe transaction (8) 
ARTEFACT - Item (def) contained in reverse (being sent back as part of) InterneT CAFE TRAnsaction
 
14 Sacked para sought desirable signatures (10) 
AUTOGRAPHS - desirable signatures (def) from PARA SOUGHT* (Sacked)
 
15 Energy of sphere revolving over top of illumination (4) 
BRIO - Energy (def) from BRO (sphere=ORB revolving) over I (top of illumination)
 
17 Trim top off vegetable (4) 
LEEK - vegetable (def) from (s)LEEK (Trim with top off)

19 Study model's score in Twickenham (10) 
CONVERSION - score in Twickenham (def) from CON (study) VERSION (model)

21 Records attempt at making ornamental textile (8) 
TAPESTRY - ornamental textile (def) from TAPES (Records) TRY (attempt at)

23 President's perfect ring (5) 
PHONE - ring (def) from P (President) HONE (perfect)

25 Animal exhibitor largely backing church group advancing right to produce spicy meat (7) 
CHORIZO - produce spicy meat (def) from CHORI (CHOIR=church group advancing R) ZO(o) backed by (Animal exhibitor largely)

26 Greek character eating an Irishman's bread (7) 
CHAPATI - bread (def) from CHI (Greek character) eating A (an) PAT (Irishman)

27 Head in pursuit of Jack and Algy's alter egos, we're told, shows determination (11) 
EARNESTNESS - Determination (def) from NESS (head) in pursuit of EARNEST homophone (we're told) of ERNEST - Jack and Algy's alter egos (in The Importance of Being Earnest) 

DOWN

1 Harsh leader removed weapon (7) 
TRIDENT - weapon (def) from (s)TRIDENT (Harsh with leader removed)

2 Numbers opposing books (8) 
ANTILOGS - Numbers (def) from ANTI (opposing) LOGS (books)

3 Cast addressing Saints (4) 
TOSS - Cast (def) from TO (addressing) SS (Saints)

4 Desserts contain balm (10) 
AFTERSHAVE - balm (def) from AFTERS (Desserts) HAVE (contain)

5 Heat rising around bottom of eccentric's whiskers (5) 
TACHE - whiskers (def) from HEAT* (rising) around C (bottom of eccentric)

6 Flyers spinning yarn with attitude (7) 
RYANAIR - Flyers (def) from YARN* (spinning)  AIR (attitude)

7 Olive's impaler? (8,5) 
COCKTAIL STICK - Olive's impaler? (cryptic def) 
 
8 Criminal regrets action concerning internal tract (13) 
GASTROENTERIC - concerning internal tract (def) from REGRETS ACTION* (Criminal)

13 Considerable support for party requiring hard work (10) 
LABOURSOME - requiring hard work (def) from SOME (Considerable) support for LABOUR (party)

16 Old craft's journey over part of motorway  (8) 
TRIPLANE - old craft (def) from TRIP (journey) over LANE (part of motorway)

18 Constable finally upholding old copper's discharge (7) 
EXPLODE - discharge (def) from E (Constable finally) upholding EX (old) PLOD (copper)

20 Chart lines of pubs behind every second ginshop (7) 
ISOBARS - Chart lines (def) from BARS (pubs) behind ISO (every second gInShOp)

22 Broadcaster's cut post, but not initially, for someone going downhill fast (5) 
SKIER - someone going downhill fast (def) from SK(y) (Broadcaster's cut) (p)IER (post, but not initially)

24 Small bed could be from north of the border (4) 
SCOT - could be from north of the border (def) from S (Small) COT (bed)