Brother or sister (3)
'brother or sister' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sibling that I've seen before include "Bro, perhaps" , "Close relative" , "Bro or sis" , "One's brother or sister" , "Maybe brother" .)
'brother or sister' is the definition.
(I've seen this in another clue)
This is all the clue.
(Another definition for sib that I've seen is " Brother".)