Rowdy spree with leader delayed after policeman finally finished striking individual (5-7)

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

RAZZLE (rowdy spree) with R moved to the end, after BOBBY + {finishe}D After the previous six straightforward clues, here we have the difficulty of the puzzle in a nutshell. Okay, BOBBY is easy enough, but if you haven’t heard of the answer and you don’t know of RAZZLE as a rowdy spree, this is just a slog.