Prevarication from husband -- back working after one (7)
I believe the answer is:
evasion
'prevarication' is the definition.
(synonyms)
'husband back working after one' is the wordplay.
'husband' becomes 'save' (husband can mean to save or conserve).
'back' is a reversal indicator.
'working' becomes 'on' (e.g. a machine is working or on).
'after' means one lot of letters go next to another.
'one' becomes 'i' (Roman numeral).
'save' written backwards gives 'evas'.
'on' after 'i' is 'ion'.
'evas'+'ion'='EVASION'
'from' is the link.
(Other definitions for evasion that I've seen before include "The act of dodging the issue." , "Cunning" , "Improper avoidance" , "deception" , "Prevarication" .)