They battle bulls and wild rooster (7)

I believe the answer is:

toreros

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'they battle bulls' is the definition.
The definition suggests an adverb but the answer is not.

'wild rooster' is the wordplay.
'wild' indicates anagramming the letters.
'rooster' is an anagram of 'TOREROS'.

'and' acts as a link.

Can you help me to learn more?

(Another definition for toreros that I've seen is " Bullfighters".)

I've seen this clue in The Guardian.

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