D/m Cryptic

[petal54]

rain's washed remaining brain away,so help needed again!
3d,4/4.a riotous mob seizes vault for WMD.a-o---m-
6d,7L.practise wrestling without one?you couldn't.t-i-e-s
11a,10.drunken bum taken on-he's a fraudster.m-u-t---n-
18d,8Lchoosing the best Celtic dances in the city
many thanks

[AlwaysConfused]

11a) mountebank

[vetuste_ennemi]

a(tom b)omb
triceps [anag - i]
mountebank [anag]

arte from today's Times, Petal.

e(clecti)c

[aelmpvw]

3d atom bomb

[petal54]

cheers AC

[petal54]

many thanks all!