We're told part of foot's to recover (4)
I believe the answer is:
heal
'recover' is the definition.
(I've seen this in another clue)
'we're told part of foot's' is the wordplay.
'we're told' indicates a 'sounds like' (homophone) clue.
'part of foot' becomes 'heel' (I've seen this before).
'heel' is a homophone of 'HEAL'.
'to' is the link.
(Other definitions for heal that I've seen before include "Get well again" , "Cure, recover" , "Restore to health" , "Cure, make well" , "remedy" .)