Priest wearing crumpled denims is coming (7)
I believe the answer is:
impends
'is coming' is the definition.
'priest wearing crumpled denims' is the wordplay.
'priest' becomes 'p' (ecclesiastical abbreviation).
'wearing' means one lot of letters goes inside another.
'crumpled' indicates an anagram.
'denims' anagrammed gives 'imends'.
'p' placed within 'imends' is 'IMPENDS'.
(Other definitions for impends that I've seen before include "Threatens" , "Approaches" .)