Not occupied? There's no hurry (2,7)
I believe the answer is:
at leisure
'not' is the definition.
Both the answer and definition are adverbs. Maybe there's a link between them I don't understand?
'occupied? there's no hurry' is the wordplay.
I cannot really see how this works, but
'occupied?' could be 'at' (being occupied or busy at something) and 'at' is found within the answer.
The remaining letters 'leisure' 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 at leisure that I've seen before include "in an unhurried fashion" , "resting" , "See ritual while taking it easy" , "Relaxing, not working" , "free" .)