A nice, all red ensemble for the poor neglected girl (10)
I believe the answer is:
cinderella
'poor neglected girl' is the definition.
'Cinderella' can be an answer for 'girl' (Cinderella is an example). I'm unsure of the 'poor neglected' bit.
'a nice all red ensemble' is the wordplay.
'ensemble' is an anagram indicator.
'nice'+'all'+'red'='niceallred'
'niceallred' is an anagram of 'CINDERELLA'.
'for the' is the link.
Can you help me to learn more?
(Other definitions for cinderella that I've seen before include "movie" , "Drudge" , "8 [BALLET]" , "[FAIRY STORY REF]" , "Pantomime heroine" .)