Stuck on a few.
1a.Politician in power likely to get bogged down(6) think it is SWAMPS or SWAMPY cant decide!
3d.Turn up before the race as stroke(4) either PATS or PETS?
12a.a symbol of love.(4) could this be ZERO as nil score in tennis?
20a.tiny swimmer finally sets a record(4) ???P scup?
18d. Putting on weight,possibly L???ING - lagging, licking if scup?
Please put me out of my misery!