Hi - I'm struggling, so hope a handful of answers will inspire me - thanks in advance!
10a Un reasonable led, spilling seed - I'll be off (6-3) ....L.-..P
12/14a The government plans to diminish this migrant cash transaction (to be confined in small, basic building) (5,6,3) ...../..G.../A..
1d Playing as well as ever, Labour diva ends up quite relaxed (8)
5d Kills off official reports (10) .I........
13d Barnier? A reign too involved with Brexit at the end (10) ....T...O.
Finally, I think 25/3d ""Abandoned right by gutless politician" as an owner might claim" is LOST PROPERTY, but I can't parse that first part of the clue.