Carry out former partner with wound in middle of heel (7)
I believe the answer is:
execute
'carry out' is the definition.
(I know that carry out can be written as execute)
'former partner with wound in middle of heel' is the wordplay.
'former partner' becomes 'ex' (an ex-partner).
'with' is an insertion indicator.
'wound' becomes 'cut' (cut is a kind of wound).
'in middle of' says to take the centre (I've seen 'in middle' mean this).
The central letters of 'heel' are 'ee'.
'cut' going inside 'ee' is 'ecute'.
'ex'+'ecute'='EXECUTE'
(Other definitions for execute that I've seen before include "Put to death - put into effect" , "Maybe send to chair" , "Carry output to death" , "Finish off" , "Put (plan) into effect; kill (a condemned person)" .)