Wonderland girl (5)
I believe the answer is:
alice
'wonderland girl' is the definition.
(I've seen this before)
'girl' is the wordplay.
I cannot quite see how this works, but
'girl' could be 'ali' (girl's name) and 'ali' 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 alice that I've seen before include "Girl famed for Wonderland adventures" , "Wonderland girl; --- B. Toklas" , "Girl in literary Wonderland" , "Lewis Carroll's heroine" , "band" .)