Make fun of a learner? Daughter's mean (6)
I believe the answer is:
ribald
'mean' is the definition.
('ribald' could historically mean wicked)
'make fun of a learner? daughter's' is the wordplay.
'make fun of' becomes 'rib' ('rib' can be a synonym of 'make fun of').
'learner?' becomes 'l'.
'daughter' becomes 'd'.
'rib'+'a'+'l'+'d'='RIBALD'
(Other definitions for ribald that I've seen before include "Mean" , "Humourous in vulgar way" , "Humorous in vulgar or disrespectful way" , "Scurrilous, bawdy" , "Bawdy and vulgar" .)