Roared to upset entertainer (8)

I believe the answer is:

toreador

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'entertainer' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'roared to upset' is the wordplay.
'upset' is an anagram indicator.
'roared'+'to'='roaredto'
'roaredto' is an anagram of 'TOREADOR'.

Can you help me to learn more?

(Other definitions for toreador that I've seen before include "He wears a flashy suit" , "killer on mount" , "Killer facing charges" , "fighter in ring" , "Too drear for a bullfighter" .)

I've seen this clue in The Mirror.

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