Crossword Genius

Dramatic wizard beside me, royally rolling in it (10)

Ross

I believe the answer is:

prosperous

I'm a little stuck... Click here to teach me more about this clue!

'dramatic' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for prosperous that I've seen before include "thriving" , "Well-to-do" , "Affluent" , "Doing well" , "Rich" .)

I've seen this clue in The Times and The Sunday Times.
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