Lively wit of corrupt priest (6)
I believe the answer is:
esprit
'lively wit' is the definition.
(I've seen this in another clue)
'corrupt priest' is the wordplay.
'corrupt' is an anagram indicator (a corrupted form).
'priest' anagrammed gives 'ESPRIT'.
'of' acts as a link.
(Other definitions for esprit that I've seen before include "Lively wit" , "Liveliness of wit" , "Vivacity, liveliness" , "Group morale is . . . . . . de corps" , "wit from France" .)