US lawman has given name to uncover predator (7)

I believe the answer is:

lioness

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

'predator' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

(Other definitions for lioness that I've seen before include "Brave woman" , "Fierce female feline" , "Elsa, for one" , "Female pride member" , "Beast" .)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.