Admit wearing gross outer clothing (5)

I believe the answer is:

gowns

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'admit wearing gross outer clothing' is the definition.
I can't judge whether this definition defines the answer.

'admit wearing gross outer' is the wordplay.
'admit' becomes 'own' (own can mean to admit or acknowledge).
'wearing' is an insertion indicator.
'outer' means to remove the middle letters.
'gross' with its centre removed is 'gs'.
'own' inserted inside 'gs' is 'GOWNS'.

Can you help me to learn more?

(Other definitions for gowns that I've seen before include "academic gear" , "Scholars' robes" , "Theatre outfits" , "Long flowing dresses for women" , "Fancy frocks" .)

I've seen this clue in The Daily Express.

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