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' is a reversal indicator.
'half cut' indicates taking half.
'parent' becomes 'mother' (type of parent).
'nob' reversed gives 'bon'.
'mother' cut in half is 'mot'.
'bon'+'mot'='BON MOT'
'from' is the 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" .)