1: Article was definite: It said Canadian fish and elk combined can have disastrous results (especially if python is added). (3, 6, 6)
3: Offer one's hand to an accountant by way of an alternative bid. (15)
8: Half disapprove of old king (3)
9: First get a French weapon. (3)
10: Song about chaps in the country (7)
14: Squaddies took in lecture (5)
16: The scales tip from bringing in Turkish money (5)
18: A group performing with energy 'The Untouchables' e.g. (5)
20: Boxer Max returned, holding heroin, for treatment (5)
21: Treason destroyed Washington insider (7)
23: Vicar regularly outdated technology (1.1.1.)
25: Mink, for one, may fly when theres trouble (3)
27: Powerful individual accommodates American doctor connected with parts of hospital drama (5,10)
28: Transplanting gave gnarled beet place to grow? (9, 6)