Small record label curtailed attempt to produce one of the blues (6)
I believe the answer is:
indigo
'small record label' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'curtailed attempt to produce one of the blues' is the wordplay.
I cannot really understand how this works, but
'attempt' could be 'go' (go is a kind of attempt) and 'go' is found within the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for indigo that I've seen before include "Ellington's Mood" , "Tropical plant" , "Violet dye" , "Deep-blue dye or colour" , "Colour - I'd go in (anag)" .)