Just a few left this morning ....
16a comedian in lace factor heading off for Wigan (5,6) s???e ???l?g?n
4d believe magazine is to go on a campaign (4,3,5) take the ???l?
17done about to be strangled by evil Italian criminal (7) ??l?c?e
Or is 4d TAKE THE TITLE? (i.e. snooker champion no.1 in a football league). Also 'a title' can be used as a synonym for a magazine. Have to admit, though, that this solution would be more appropriate to winning a campaign rather than going on one.