Aunt who's fair game? (5)
I believe the answer is:
sally
'aunt' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sally that I've seen before include "Sortie; witty retort" , "Go out" , "excursion" , "Witty riposte" , "Sortie - Gracie Fields song" .)