Performer’s series of gigs bringing in large numbers mostly wicked! (10)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Performer ’s series of gigs bringing in large numbers, mostly wicked [ ROU <t> (=large number, i.e. pack, flock; “mostly” means last letter is dropped) + BAD (=wicked)] in TOUR (=series of gigs, i.e. concerts)