Did coach express disapproval? Nothing radical (7)
I believe the answer is:
tutored
'did coach' is the definition.
(coach can mean to tutor)
'express disapproval? nothing radical' is the wordplay.
'express disapproval?' becomes 'tut' (tutting is making a disapproving sound).
'nothing' becomes 'O' (looks like zero - 0).
'radical' becomes 'red' (I've seen this in another clue).
'tut'+'o'+'red'='TUTORED'
(Other definitions for tutored that I've seen before include "Privately taught" , "Was coach" , "Rude tot (anag.)" , "Coached" , "Disciplined" .)