Clever humour (3)
I believe the answer is:
wit
'clever humour' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for wit that I've seen before include "'Brevity is the soul of ...'" , "Ingenuity or verbal fun" , "Clever humour in speech" , "Drollery" , "Maker of clever remarks" .)