Don't gawp so much - it really is outstanding (8)

I believe the answer is:

peerless

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

I can't explain the rest of the clue.

(Other definitions for peerless that I've seen before include "Outstanding" , "superb" , "Without equal, being without a lord?" , "Unrivalled" , "Having no equals" .)

I've seen this clue in The Irish Times.

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