Big sole, perversely, binds (7)
I believe the answer is:
obliges
'binds' is the definition.
('oblige' can be a synonym of 'bind')
'big sole perversely' is the wordplay.
'perversely' indicates anagramming the letters.
'big'+'sole'='bigsole'
'bigsole' is an anagram of 'OBLIGES'.
(Other definitions for obliges that I've seen before include "Accommodates" , "Compels" , "Forces" .)