Crossword Genius

Old Spanish hero in the fight against crime (3)

Ross

I believe the answer is:

cid

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

'old spanish hero' is the definition.
(I've seen this in another clue)

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

Can you help me to learn more?

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.