Crossword Genius

Excellent brief (5)

Ross

I believe the answer is:

prime

This clue is a double definition.

'excellent' is the first definition.
(thesaurus)

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

(Other definitions for prime that I've seen before include "Brief" , "Best quality, perhaps of beef" , "Fundamental - of highest quality" , "put in the picture" , "hour for prayer" .)

I've seen this clue in The Telegraph.
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