Mostly felt fans suffering in arrest (7)
I believe the answer is:
snaffle
'arrest' is the definition.
(thesaurus)
'mostly felt fans suffering' is the wordplay.
'mostly' means to remove the last letter.
'suffering' is an anagram indicator.
'felt' with its last letter removed is 'fel'.
'fel'+'fans'='felfans'
'felfans' with letters rearranged gives 'SNAFFLE'.
'in' is the link.
(Other definitions for snaffle that I've seen before include "Get hold of" , "A bit; steal (colloq.)" , "A bit; filch" , "A bit; to grab for oneself" , "Appropriate" .)