Cantankerous parish priest interrupts confused story (7)
I believe the answer is:
stroppy
'cantankerous' is the definition.
'parish priest interrupts confused story' is the wordplay.
'parish priest' becomes 'pp' (abbreviation for parish priest).
'interrupts' is an insertion indicator.
'confused' indicates anagramming the letters.
'story' with letters rearranged gives 'stroy'.
'pp' going within 'stroy' is 'STROPPY'.
(Other definitions for stroppy that I've seen before include "Difficult" , "Ill-tempered" , "Bad-tempered, argumentative" , "Obstreperous" , "Unhelpful" .)