In one way and another, the girl's moony! (5)
I believe the answer is:
lunar
'moony' is the definition.
(I've seen this in another clue)
'in one way and another the girl's' is the wordplay.
I cannot really see how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found within the answer.
'another' could be 'r' (I've seen this in other clues) and 'r' is present in the answer.
The remaining letters 'la' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for lunar that I've seen before include "Pertaining to the moon" , "Period of 28 days" , "Belonging to the moon" , "Of a natural satellite" , "of a circling body" .)