Quip from toff about half-cut parent (3,3)
I believe the answer is:
bon mot
'quip' is the definition.
(I've seen this in another clue)
'toff about half-cut parent' is the wordplay.
'toff' becomes 'nob' (UK slang for a wealthy or upper-class person).
'about' shows that the letters should be reversed in order.
'half cut' suggests halving the letters.
'parent' becomes 'mother' (type of parent).
'nob' reversed gives 'bon'.
'mother' cut in half is 'mot'.
'bon'+'mot'='BON MOT'
'from' acts as a link.
(Other definitions for bon mot that I've seen before include "Apt or witty remark - in France" , "term of French, it's appropriate to say" , "quip" , "Appropriate word or expression - in France" , "The right or apposite word - in France" .)