ACROSS
9 Water seeping in Victoria Quay (4) AQUA [T]
10 Create cover art showcasing almost any city (10) TRAVANCORE {COVER+ART}* over {ANy} Travancore was never a city, it was a Kingdom/Region
11 Abruptly turn violent in fight for justice (6) VIRTUE {VI{TURn*}E}
12 Game played in Spooner's club venue (4-4) HAND-BALL (~band hall to hand-ball)
16 Student getting result in advance (4) LEND {L}{END}
17 Becomes weak from trials (6,3) TRAILS OFF {TRIALS}* [RA]
21 Fixed bridges around river after freezing point's passed (8) OCCURRED {CUR{R}ED}<=>{0C}
22 Eager American lost in European country (6) HUNGRY HUNGaRY
24 Manager bothering previous supplier on vacation (10) SUPERVISOR {PREVIOUS+Su...eR}*
25 Shoot a smart guy (4) WHIZ [DD]
DOWN
1 Strangely quiet lawyer, at first gets a drink (7) TEQUILA {QUITE}*{La...r}{A}
2 Upgrade old key (5) EXALT {EX}{ALT}
3 Restricted dining option upset men unpacking sandwiches (3,4) SET MENU [T]
5 Studied opening of legal auditor's books (6) LEARNT {Le..l}{EAR}{NT}
6 Incentives for bicycle moves in football, say (9) KICKBACKS [DD]
7 Pulse and sugar could produce this excess with age (7) SURPLUS {SURPLUS+AGE}*=PULSE+SUGAR}
14 Starts to unwind near Amadeus playing on and on (2,7) AD NAUSEUM {Un...d+Near+AMADEUS}*
16 Address line etc. modified getting united again (7) LECTURE {L}{ETC}{U}{RE}
18 Take after one's parents in their careers! (7) INHERIT*
19 Overlook copy having one version originally (7) FORGIVE {FORG{1}{Ve...n}E}
20 Chicken caught by black bird (6) CRAVEN {C}{RAVEN}
23 Prince in bar's counter drinking a whiskey (5) NAWAB {BAN}<= over {A}{W}
Reference List
New = N, University = U, Student = L, River = R, American = A, Old = O, Small = S, Key = ALT, Books = NT(New Testament), Line = L, United = U, Again = RE, Caught = C, Whiskey = W