Urge to kill bull stood out (9)

I believe the answer is:

bloodlust

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

'urge to kill' is the definition.
I can't tell whether this defines the answer.

'bull stood out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'bull'+'stood'='bullstood'
'bullstood' with letters rearranged gives 'BLOODLUST'.

Can you help me to learn more?

(Other definitions for bloodlust that I've seen before include "Desire to slaughter" , "Being out for a killing" .)

I've seen this clue in The Sun.

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