Girl built for audition? (4)
I believe the answer is:
maid
'girl' is the definition.
(maid is a kind of girl)
'built for audition?' is the wordplay.
'built' becomes 'made' ('make' can be a synonym of 'build').
'for audition?' indicates a 'sounds like' (homophone) clue.
'made' sounds like 'MAID'.
(Other definitions for maid that I've seen before include "Female servant - young girl" , "Damsel" , "- - -of-all-work" , "Female domestic servant" , "Serving girl" .)