Crossword Genius

A foot back (3)

Ross

I believe the answer is:

aft

'back' is the definition.
(I've seen this before)

'a foot' is the wordplay.
'foot' becomes 'ft' ('ft' can be a synonym of 'foot').
'a'+'ft'='AFT'

(Other definitions for aft that I've seen before include "Toward's a ship's stern" , "Toward the stern of a boat" , "behind at sea" , "towards the end" , "Towards the back on board" .)

I've seen this clue in the Evening Standard.
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