ACROSS
1 - Win and celebrate (7) - TRIUMPH [DD]
5 - Popular - word describing one caretaker (7) - {IN}{TER{I}M} INTERIM
9 - Report coarse players (9) - {BROAD}{CAST} BROADCAST
10 - Awkward drunk (5) - TIGHT [DD]
11 - Commercial outlet in period before Christmas (6) - {AD}{VENT} ADVENT
12 - Viceroy, first to knock male club that's disreputable (7) - {K}{HE}{DIVE} KHEDIVE
14 - Poisonous plant, British, brought in by her boy (4,11) - {HER}{B} {CHRISTOPHER} HERB CHRISTOPHER
16 - Columbian one, one drunk very rarely (4,2,1,4,4) - ONCE IN A BLUE MOON*
19 - A giant, swine holding queue back (7) - {GO{LIAT<-}H<-} GOLIATH
20 - Say name of Island (6) - {STATE}{N} STATEN
23 - Love huge Greek character (5) - {O}{MEGA} OMEGA
24 - Not connected by marriage, a Parisian's told (9) - {UN}{RELATED} UNRELATED
25 - Swing - net added to facility, reportedly (7) - {TRAP}{EZE}(~ease) TRAPEZE
26 - Where youngsters play could make one spit, perhaps (7) - SANDPIT [DD]
DOWN
1 - Punch's dog in play about bishop (4) - {TO{B}Y} TOBY
2 - Appropriate batting line-up (2,5) - IN ORDER [DD]
3 - Fly military aircraft across Germany and Spain (5) - {MI{D}G}{E} MIDGE
4 - Sadness shown by audience coming from play (10,5) - {HEARTBREAK} {HOUSE} HEARTBREAK HOUSE
5 - Saying last rites, talk so differently (2,5,3,5) - IT TAKES ALL SORTS*
6 - Main part, perhaps, I retell to comic (5,4) - TITLE ROLE*
7 - Is lying in light rough that's deceiving (7) - {ROGU{IS}H*} ROUGISH
8 - Old French president needing hand with job (10) - {MITT}{ERRAND} MITTERRAND
13 - Rejected, we hear, in every part (10) - (~threw out)THROUGHOUT
15 - A new chair vandalised, and crockery? (9) - CHINAWARE*
17 - Yorkshire river passing over a large crater (7) - {CALDER}{A} CALDERA
18 - Dance on stage, saving energy (3-4) - ONE-STEP
21 - Ready to drop a couple of lines home (3,2) - {A}{LL} {IN} ALL IN
22 - This may turn up? Correct (4) - EDIT <-