Singer to manage mystical sound in musical sections (5,4)

I believe the answer is:
bruno mars
'mystical sound in musical sections' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.
'singer to manage' is the wordplay.
I cannot quite understand how this works, but
'manage' could be 'run' (both can mean to organise) and 'run' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
I've seen this clue in The Guardian.
Want a hint initially instead of a full solution?
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