Proud to have been robbed at gunpoint? (5,2)

I believe the answer is:

stuck up

I'm a little stuck... Click here to teach me more about this clue!

'proud' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

(Other definitions for stuck up that I've seen before include "Carried out robbery, perhaps" , "Bill may be" , "snobbish?" , "Pretentious" , "Posted" .)

I've seen this clue in the Evening Standard.

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