Trouble for backing singer dubbed scary (7)
I believe the answer is:
problem
'trouble' is the definition.
(I know that trouble can be written as problem)
'backing singer dubbed scary' is the wordplay.
I cannot quite see how this works, but
'backing' could be 'pro' (being pro something is backing or supporting it) and 'pro' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for problem that I've seen before include "Matter to be solved" , "One requiring solution" , "Matter hard to cope with" , "Difficulty, poser" , "Brainteaser" .)