Crossword Genius

Rogue gets three keys (3)

Ross

I believe the answer is:

cad

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

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for cad that I've seen before include "designing software" , "Dishonourable man of decadent sort" , "Stinker" , "One behaves dishonourably" , "A knave, real rotter" .)

I've seen this clue in The Mirror.
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.