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Outstanding restaurant's curt rejection of booking enquiry (7)

Ross

I believe the answer is:

notable

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

I don't understand the remainder of the clue.

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(Other definitions for notable that I've seen before include "well known" , "Great" , "Significant or distinguished" , "Striking" , "Widely known and esteemed" .)

I've seen this clue in The Guardian.
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