1 Down, Good? I'm expert! Rubbish (8) G?M?R???
6 Down, Primarily unreliable 'comrade', I fancy (3,2,4) A?I ?? ?O?R
14 Down, Money,I'll argue, is distributed willy-nilly (6,3) ?????? L??
18 Down, Point in New York supplied with nitrogen gas (7) ??Y?T??
Many thanks