A masked marauder! (3)

I believe the answer is:

fox

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

'a masked marauder' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

This is all the clue.

Can you help me to learn more?

(Other definitions for fox that I've seen before include "Charles ---, Pitt's Whig opponent" , "Nonplus" , "Countryside carnivore" , "Deceive; Reynard" , "earth-dweller" .)

I've seen this clue in the Evening Standard.

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.