Heckles a bishop in seconds (8)
I believe the answer is:
barracks
'heckles' is the definition.
(I've seen this before)
'a bishop in seconds' is the wordplay.
'bishop' becomes 'rr' (abbreviation for Right Reverend).
'in' indicates putting letters inside.
'seconds' becomes 'backs' ('back' can be a synonym of 'second').
'a'+'rr'='arr'
'arr' placed within 'backs' is 'BARRACKS'.
(Other definitions for barracks that I've seen before include "Buildings to accommodate armies" , "Military quarters" , "men who fight in houses here" , "Cheers ironically" , "Buildings for soldiers" .)