6a: Go out with joker Jack, say (5,4) ???r?,C???;
11a: Gimmicky formula in points fiddled (10)N?????g???;
16a: Place police station in northern alley (7) ???c???;
1d:Craziness of building with no purpose (5)???l?;
9d: TV Presenter turning to no mean detective (6,6)???o??,?o?m?s;
Any help would be most appreciated!