Skirt has to be returned as I don't think much of it (3)
I believe the answer is:
meh
'skirt has to be returned' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'i don't think much of it' is the wordplay.
I cannot really understand how this works, but
'i' could be 'me' and 'me' is located in the answer.
A single letter 'h' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'as' acts as a link.
Can you help me to learn more?
(Other definitions for meh that I've seen before include "expression of indifference" , "am I bovvered?" , "Unexciting (modern slang)" , "Not much cop" , "Who cares" .)