Bully husband, clergyman heading off (6)
I believe the answer is:
hector
'bully' is the definition.
(I know that bully can be written as hector)
'husband clergyman heading off' is the wordplay.
'husband' becomes 'h' (abbreviation).
'clergyman' becomes 'rector' (rector is a kind of clergyman).
'heading off' means to remove the first letter.
'rector' with its first letter taken away is 'ector'.
'h'+'ector'='HECTOR'
(Other definitions for hector that I've seen before include "Annoy like a Trojan hero" , "Greek fighter" , "Nag" , "'Browbeat, ballyrag (6)'" , "Intimidate by bullying, or Greek warrior killed by Achilles" .)