Crossword Genius

Coach (or several of them) about to return 2? (7)

Ross

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" .)

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