Identical outfit (7)

I believe the answer is:

uniform

This clue is a double definition.

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

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

(Other definitions for uniform that I've seen before include "Regimentals" , "Evening" , "The same throughout" , "Not changing" , "Distinctive outfit" .)

I've seen this clue in The Sun.

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