1a Yarmouth - 'arm' (gun, in) 'youth'
8d Fiendish - 'fen (bog) dish (bowl)' (broken by) 'i' (one)
9a Lead-free - anag (free) 'lead' is 'Deal'
13a Abandoned - 'a ban (bar) done (over) d(iner; top of)'
25a Dominate - 'min(ister)' (in) 'do (party) ate (had)'