Husband gets bull with a deception (4)
I believe the answer is:
hoax
'deception' is the definition.
(hoax is a kind of deception)
'husband gets bull with a' is the wordplay.
'husband' becomes 'h' (abbreviation).
'gets' is a charade indicator (letters next to each other).
'bull' becomes 'ox'.
'with' is an insertion indicator.
'ox' placed around 'a' is 'oax'.
'h'+'oax'='HOAX'
(Other definitions for hoax that I've seen before include "Prank" , "Fake, such as Piltdown Man" , "Humorous or malicious deception" , "Fool" , "A plan to deceive" .)