There's little work for us in music! (4)
I believe the answer is:
opus
'music' is the definition.
(I know that opus is a type of music)
'there's little work for us' is the wordplay.
I cannot quite understand how this works, but
'work' could be 'op' (abbreviation for opus) and 'op' is located in the answer.
'us' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for opus that I've seen before include "(Numbered) musical composition" , "Composition - magnum __" , "Creative work, eg in writing, art or music" , "A Latin work" , "Work of 25 perhaps" .)