Brilliant Djokovic perhaps keeps winning (6)
I believe the answer is:
superb
'brilliant' is the definition.
(I've seen this in another clue)
'djokovic perhaps keeps winning' is the wordplay.
I cannot quite see how this works, but
'winning' could be 'up' (eg being up at half time in football) and 'up' is found in the answer.
The remaining letters 'serb' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for superb that I've seen before include "Excellent, magnificent" , "Brilliant, fantastic" , "Splendid, marvellous" , "Impressively splendid" , "Quite splendid, really excellent" .)