I don’t like that posh skirt (4)
I believe the answer is:
tutu
'skirt' is the definition.
(I know that tutu is a type of skirt)
'i don't like that posh' is the wordplay.
'i don't like' becomes 'tut' (I can't explain this - if you can you should give a lot more credence to this answer).
'that posh' becomes 'u' (abbreviation for upper-class - opposite to non-U).
'tut'+'u'='TUTU'
Can you help me to learn more?
(Other definitions for tutu that I've seen before include "Ballet dancer's short skirt" , "Short skirt for ballet dancer" , "South African archbishop, b. 1931" , "Ballerina's stiff skirt" , "8 [BALLET] term" .)