A little embarrassed to see what the girl's wearing (4)
I believe the answer is:
pink
'a little' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'embarrassed to see what the girl's wearing' is the wordplay.
I cannot really understand how this works, but
'wearing' could be 'in' (in jeans or in a dress) and 'in' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pink that I've seen before include "Peer" , "Salmon-coloured" , "prick" , "Colour; herbaceous plant" , "Light red - flower" .)