Solution to 25A has been deliberately left unsolved and is to be answered by a non-regular/novice commenter, with proper annotation. Those who have answered earlier in the week, please give others a chance.
Open for anyone to answer, if not solved by 1 PM.
ACROSS
1 Disclosures from relatives travelling around Ontario (11) REVELATIONS {REVELATI{ON}S*}
9 Silver containing liquor's growing old (5) AGING {A{GIN}G}
10 After dismantling a trap, soldiers start to tackle flat (9) APARTMENT {A+TRAP}*{MEN}{Ta...e}
11 Gradually... like climbing stairs (4,2,4) STEP BY STEP [DD}
12 Type of pie made by female network (4) FLAN {F}{LAN}
15 Do without stags? (3,5) HEN PARTY [CD]
17 Funnily, Dick owns something usually found near an airstrip (8) WINDSOCK*
22 Sadly, unfinished salad is returned (4) ALAS SALAd<=
23 Communication devices for use in prisons? (10) CELLPHONES [CD]
26 Bird sitting on fort starts to attack in retaliation in kind (3,3,3) TIT FOR TAT {TIT}{FORT} with {To}At..k}<=
27 From the latter part, treasurer is more certain (5) SURER [HIPS]
28 Quick training not recommended for aviators! (5,6) CRASH COURSE [C&DD]
DOWN
1 Increase serai construction (5) RAISE*
2 After Virginia, Georgia accepts financial instruments for vagrants (9) VAGABONDS {VA}{GA}{BONDS}
3 Meet and work together, fabricating lies about artificial intelligence (6) LIAISE {LI{AI}SE*}
6 Suspect all tamers ill treated (5,1,3) SMELL A RAT*
7 Look after average Zoroastrian (6) PARSEE{SEE}<=>{PAR}
8 Coloured fluid in pig-pen is smelly (6) STINKY {ST{INK}Y}
14 Attic fans turning? Splendid! (9) FANTASTIC*
16 Buyer's follower follows purdah to some extent (9) PURCHASER {CHASER}<=>{PURdah}
17 Eccentric mother in law throwing away lemon to produce ghostly creature (6) WRAITH {moTHeR+In+lAW}*
21 Before game of chance, baron's drunk (6) BLOTTO {LOTTO}<=>{B}
24 Run back with directions and give medical aid (5) NURSE {RUN<=}{SE}
25 Couch possessed by abbess of Accra (4) ?O?A (Addendum - SOFA [T] - See comments)
Reference List
Female = F, Length = L, Editor = ED, Zulu = Z, Street = ST, Operation = OP, Chinese = CH, Eastern = E, Baron = B

