Across
Watery lake, wet banks (6)
I haven't cracked this one yet — but Fifteensquared have:
SOPPY [wet] round [banks ] L [lake]
First persons in Europe to welcome leader of regime, old, old city (7)
I haven't cracked this one yet — but Fifteensquared have:
JE [French] and ICH [German] first person pronouns round [to welcome] R [first letter – leader – of Régime] + O [old]
Hawthorns tip on one side (9)
See 4 down
Mad reservists? (5)
I haven't cracked this one yet — but Fifteensquared have:
B ARMY – nice one!
Lethal drug containing Irish whiskey? Ultimately, it's not true (5,4)
I haven't cracked this one yet — but Fifteensquared have:
FATAL [lethal] round [containing] IR [Irish] and Y [last letter – ultimately – of whiskeY] [+ E [drug] accidentally omitted earlier – thanks NeilW @11]
Cross bridges if to give evidence (7)
Warning that's right about which man's after my own heart? (6)
I haven't cracked this one yet — but Fifteensquared have:
R [right] around which is GUY [man] after AU [pAUl’s own heart] – a very neatly constructed clue
Old wine in Pinot, bowels evacuated (4,2)
I haven't cracked this one yet — but Fifteensquared have:
ASTI [wine] in P[ino]T [bowels evacuated!]
Bleat about faceless joint, one serving non-alcoholic drinks (7)
See 2
Toilet empty, entering toilet is a gamble (5)
Double entendre primarily in string (5)
Bitter bread possibly English, I'm not sure Napoleon eating it (4,5)
I haven't cracked this one yet — but Fifteensquared have:
BONEY [Napoleon] round [eating] E [English] + ERM [I’m not sure] – amusing definition, bread being slang for money
8d
Cause trouble, as might a 3? (4,3,3,3)
Shrub mainly robust, leastwise at every border (6)
I haven't cracked this one yet — but Fifteensquared have:
first and last letters [at every border] of MainlY RobusT LeastwisE
Down
Old instrument still under fire (7)
22a
Blade Runner film award is the peak, pope claims (5,9)
Putin not entirely sorry, not right when subversive girls ultimately jailed — them? (5,4)
I haven't cracked this one yet — but Fifteensquared have:
anagram [subversive] of PUTI[n] + SOR[r]Y [sorry, not right] + S last letter [ultimately] of girlS – not quite & lit but a very clever construction and surface
10a
Can I see limits in Jamaican running, accepting premier of sprinters is Olympic gold medallist? (7,5)
Very eager to lose gram to get thin (5)
For starters, consider each northern constellation — to be one in the south? (9)
I haven't cracked this one yet — but Fifteensquared have:
First letters [starters] of Consider Each Northern + TAURUS [constellation]
Shellfish gobbled by boy's terrapin (6)
See 28
Make-up getting criticism in old comedy (9)
I'm surprised to see politician with a large strawberry scoffing fruit (9)
I haven't cracked this one yet — but Fifteensquared have:
GORBY [politician with a large strawberry] round [scoffing] fruit Mikhail Gorbachev’s birthmark is, actually, a port-wine stain [nevus flammeus] – see here rather than a strawberry hemangioma but I hope that won’t be too contentious
Thumb thing — thumbthing thought? (7)
I haven't cracked this one yet — but Fifteensquared have:
the lisping wordplay refers to the game of ‘Hunt the thimble’, in which the thimble is something sought
Kind of case where risk overshadows challenge (6)
Untrustworthy in the end, locate new attendant (7)
I haven't cracked this one yet — but Fifteensquared have:
anagram [new] of LOCATE + last letter [in the end] of untrustworthY
Unpleasant stuff deposited in an amount of money (6)
Open on time (5)
Principle number eight, gutless (5)
Type letters or click words in the clue