Go abroad for audition (6)
I believe the answer is:
tryout
'for audition' is the definition.
(synonyms)
'go abroad' is the wordplay.
'go' becomes 'try' (both can mean an attempt).
'abroad' becomes 'out' (abroad can mean away or out).
'try'+'out'='TRYOUT'
(Other definitions for tryout that I've seen before include "'Put to the test (3,3)'" , "Test for suitability" , "Test performance" , "Experiment with" , "Trial, audition" .)