Ironic, droll (3)
I believe the answer is:
wry
I believe this clue is a double definition.
'ironic' is the first definition.
(wry can mean ironic or humorous)
'droll' is the second definition.
(I've seen this in another clue)
(Other definitions for wry that I've seen before include "Drily humorous" , "Mockingly humorous" , "Of humour, dry and mocking" , "Of facial expression, mocking or twisted" , "Dry and mocking, or bent out of shape" .)