I've got four left to do:
17 ac. Not entirely sincere, bravo for thinkers (7) I have ?e?e??? Is it cerebel, cerebra?
18dn Brutal, lying decapitated (8) ????l?s? ruthless?
22dn Quickly put last of vinegar in sauce (6) ??e?t?
22ac Old money put in something round (6) ??s???