Coach (or several of them) about to return 2? (7)
I believe the answer is:
trainer
'coach' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
(Other definitions for trainer that I've seen before include "Shoe; instructor" , "Sports shoe" , "Sports/casual shoe" , "Machine that simulates the conditions of flying a plane" , "Person in charge of stable" .)