Still happening? Not quite (4)
I believe the answer is:
even
I believe this clue is a triple definition!
'still' is the first definition.
(synonyms)
'happening?' is the second definition.
(I've seen this in another clue)
'not' acts as a link.
'quite' is the third definition.
(thesaurus)
(Other definitions for even that I've seen before include "Fair" , "Plumb" , "Like 2, 4 or 6, say" , "Tied" , "Steady or smooth" .)