Religious Parisian article behind complaint (5)
I believe the answer is:
piles
'complaint' is the definition.
(I've seen this before)
'religious parisian article behind' is the wordplay.
'religious' becomes 'pi' (old-fashioned term for pious).
'parisian article' becomes 'les' (I've seen this in another clue).
'behind' says to put letters next to each other.
'pi'+'les'='PILES'
(Other definitions for piles that I've seen before include "complaint" , "Heaps" .)