Draw back English keys (3)
I believe the answer is:
ebb
'draw back' is the definition.
(I've seen this in another clue)
'english keys' is the wordplay.
'english' becomes 'E' (abbreviation).
'keys' becomes 'bb' (two B's - as in the musical key of B).
'e'+'bb'='EBB'
(Other definitions for ebb that I've seen before include "(Water) recede" , "Initially Mrs Browning's" , "Tidal retreat" , "Go out like tide (3)" , "Withdraw heartless" .)