Crossword Genius

A foot farther back (3)

Ross

I believe the answer is:

aft

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'back' is the definition.
(associated in meaning)

'a foot farther' is the wordplay.
'foot farther' becomes 'ft' (synonyms. I am not sure about the 'farther' bit.).
'a'+'ft'='AFT'

Can you help me to learn more?

(Other definitions for aft that I've seen before include "At the back at sea" , "Toward's a ship's stern" , "Of ship, fat in the rear" , "At the back of a ship" , "Towards rear (of ship)" .)

I've seen this clue in the Evening Standard.
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