The most common and most likely answer to this crossword clue is the 3 letter word YOU
Y
O
U
More clues leading to the result YOU
- Who’s reading this letter out loud?
- Assertion of solidarity with players from Broadway?
- I don't know what to say to driver after trip?
- Solver’s early days? Half of that is forgotten
- It’s no good abandoning inexperienced or junior solver
- Lad, the almost disappearing one
- Second person involved in family outing
- I’m evidently being informed, I know!
- I agree to challenge solvers, ultimately for a very long time
- Ordering again? Between the two of us, I couldn't agree more
Buddy explains!

The straight part
We know that "I agree to challenge" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i agree to challenge = you.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does YOU mean?
YOU verb- To address (a person) using the pronoun you (in the past, especially to use you rather than thou, when you was considered more formal).
- (object pronoun) The people spoken, or written to, as an object.
- (reflexive pronoun) (To) yourselves, (to) yourself.
- (object pronoun) The person spoken to or written to, as an object. (Replacing thee; originally as a mark of respect.)
- (subject pronoun) The people spoken to or written to, as a subject. (Replacing ye.)
- (subject pronoun) The person spoken to or written to, as a subject. (Originally as a mark of respect.)
- (indefinite personal pronoun) Anyone, one; an unspecified individual or group of individuals (as subject or object).