Girl back from eastern Australia (3)
I believe the answer is:
zoe
This might be a double definition.
'girl' is the first definition.
'back from eastern australia' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for zoe that I've seen before include "Girl" , "Girl's name" , "___ Ball, broadcaster" .)