Does the job of a deputy tolerate wicked behaviour? (6,2)
I believe the answer is:
stands in
'does the job of a deputy' is the definition.
(a deputy stands in for someone else)
'tolerate wicked behaviour?' is the wordplay.
'tolerate' becomes 'stand' (synonyms).
'wicked behaviour?' becomes 'sin' (sinning is behaving wickedly).
'stand'+'sin'='STANDS IN'
(Other definitions for stands in that I've seen before include "deputy" , "Deputises" , "Acts as sub" , "Substitutes" , "Acts as a substitute" .)