An eye for an I?

REBUS

Think of a puzzle where letters or symbols stand in for words or parts of words.

This clue plays on the phrase "an eye for an eye," swapping "eye" with the letter "I" to hint at a word that sounds like "I." The answer is "rebus," a type of puzzle where pictures or letters represent words or parts of words—here, the "I" stands in for the word "eye." It’s a clever nod to both the literal letter and the idea of substitution in wordplay.