Dance trick first seen in girl's audition (5)
I believe the answer is:
conga
'dance' is the definition.
(conga is a type of dance)
'trick first seen in girl's audition' is the wordplay.
'trick' becomes 'con' (a con is a fraud or trick).
'first seen in' suggests taking the first letters.
The initial letters of 'girl audition' is 'ga'.
'con'+'ga'='CONGA'
(Other definitions for conga that I've seen before include "Dance of 3 steps and a kick by people in single file" , "Long-line dance" , "Dance performed in line" , "Cuban dance of three steps followed by a kick" , "Chain dance" .)