Opera stars covering Bob Marley? (5)

I believe the answer is:

rasta

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'bob marley?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'opera stars covering' is the wordplay.
'covering' indicates the answer is hidden within the clue.
'RASTA' can be found hidden inside 'opera stars'.

Can you help me to learn more?

(Other definitions for rasta that I've seen before include "black believer" , "Follower of Rastafarianism" , "Dreadlocked devotee" , "Jamaican sect member" , "West Indian cult member" .)

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