Girl's name that is used by another (5)
I believe the answer is:
annie
'girl's name that is used by another' is the definition.
'Annie' can be an answer for 'girl's'. I'm unsure of the remainder of the definition.
'girl's name that is used by' is the wordplay.
'girl's name' becomes 'ann' (I've seen this before).
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'used by' says to put letters next to each other.
'ann'+'ie'='ANNIE'
Can you help me to learn more?
(Other definitions for annie that I've seen before include "said to carry a gun" , "Musical about markswoman" , "Miss Laurie" , "Popular musical about girl orphan" , "Musical about red-handed Orphan girl" .)