Crossword Genius

Shape for rug (6)

Ross

I believe the answer is:

format

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

'for rug' is the wordplay.
'rug' becomes 'mat' (I've seen this before).
'for'+'mat'='FORMAT'

(Other definitions for format that I've seen before include "Structure, layout" , "Way in which something is presented" , "Style or arrangement of procedure" , "General arrangement of a publication" , "magazine" .)

I've seen this clue in The Telegraph.
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