Rough terrain for coach (7)
I believe the answer is:
trainer
'for coach' is the definition.
(as in a sports coach)
'rough terrain' is the wordplay.
'rough' indicates an anagram (a rough or broken ordering of the letters).
'terrain' anagrammed gives 'TRAINER'.
(Other definitions for trainer that I've seen before include "Person in charge of stable" , "Running shoe" , "Casual 11 ac" , "One who prepares sportspeople or horses" , "Coach - one of a pair of shoes?" .)