Slowly an enlisted American gets into trouble (6)
I believe the answer is:
adagio
'slowly' is the definition.
(I've seen this in another clue)
'an enlisted american gets into trouble' is the wordplay.
'an' becomes 'a'.
'enlisted american' becomes 'gi' (I can't justify this - if you can you should give a lot more credence to this answer).
'gets into' means one lot of letters goes inside another.
'trouble' becomes 'ado' (both can mean bother or commotion).
'a'+'gi'='agi'
'agi' inserted into 'ado' is 'ADAGIO'.
Can you help me to learn more?
(Other definitions for adagio that I've seen before include "(A movement) to be played slowly" , "Slow musical passage" , "Musical composition to be played slowly and gracefully" , "going slowly in work" , "Slowly (mus.)" .)