Eyeliner flaw (5)

I believe the answer is:

smear

(Other definitions for smear that I've seen before include "sample on slide" , "Badmouth" , "Besmirch" , "Bedaub with oily stuff - defame" , "Unwarranted accusation" .)

I've seen this clue in the King Feature Syndicate.

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.