Shoe for a coach (7)
I believe the answer is:
trainer
This clue is a double definition.
'shoe' is the first definition.
(I've seen this before)
'a coach' is the second definition.
(thesaurus)
'for' acts as a link.
(Other definitions for trainer that I've seen before include "Person in charge of stable" , "one might put one's foot in it" , "Sports shoe" , "He assists athlete to become fit" , "The odd thing an athlete may leave behind" .)