A loud ceremony to cast out eastern demon (5)

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

A + F (forte, so “loud”) + RIT (e) (“ceremony” to cast out E (east)) An afrit is an evil demon in Arabic mythology (as well as being the pseudonym of Alistair Ritchie, one of the pioneers of the British cryptic crossword).