In difficult time husband will be believed (7)
I believe the answer is:
thought
'believed' is the definition.
('think' can be a synonym of 'believe')
'in difficult time husband' is the wordplay.
'in' is an insertion indicator.
'difficult' becomes 'tough' ('tough' can be similar in meaning to 'difficult'**).
'time' becomes 't'.
'husband' becomes 'h'.
'tough'+'t'='tought'
'tought' placed around 'h' is 'THOUGHT'.
'will be' is the link.
(Other definitions for thought that I've seen before include "Performed brain operations" , "care" , "Idea, opinion" , "Philosopher must master this" , "Pensee; consideration" .)