Cruel to ignore new girl (6)
I believe the answer is:
violet
'girl' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for violet that I've seen before include "Bloomer" , "Rainbow colour; flower" , "See 9" , "It nods on Oberon's bank" , "Girl's name - colour" .)