Crossword Genius

Spy something the make-up is trying to conceal? (4)

Ross

I believe the answer is:

mole

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

'spy' is the definition.
(I know that mole is a type of spy)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for mole that I've seen before include "Spy, skin spot and furry animal" , "Counterspy" , "Amount of substance" , "Underground worker!" , "Skin spot; breakwater" .)

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.