An eye for an eye (3,3,3)

I think it could be either:

Which length description are you looking for?:

3,3,3

tit for tat

'an eye for an eye' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for tit for tat that I've seen before include "reprisal" , "satisfaction" , "revenge" , "protection given to Barnet" , "Retaliation called for" .)

I've seen this clue in The Guardian, The Telegraph and The Times.

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.