Fairy tale sibling (6)
I believe the answer is:
hansel
'fairy tale sibling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hansel that I've seen before include "... and Gretel (fairy story)" , "abandoned boy" , "Brother of 9 Down in Grimms' fairytale and opera by Engelbert Humperdinck" , "Panto (part title)" , "Grimm child" .)