All the same, it gets worn (7)

I believe the answer is:

uniform

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

I don't understand how the remainder of the clue works.

(Other definitions for uniform that I've seen before include "Alike all over" , "Always the same, like army clothes" , "Consistent, unvarying" , "Regular; clothing" , "Regimentals" .)

I've seen this clue in the Evening Standard.

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