Quip, witty saying (7)
I believe the answer is:
epigram
This clue is a double definition.
'quip' is the first definition.
(I know that quip can be written as epigram)
'witty saying' is the second definition.
(I've seen this in another clue)
(Other definitions for epigram that I've seen before include "witty comment" , "Sally perhaps" , "Brief witty saying" , "Concise witty remark" , "Witty poem" .)