The most common and most likely answer to this crossword clue is the 1 letter word I
I've seen this crossword clue in The Guardian
I
More clues leading to the result I
- do like to be beside the sea!
- there's one thing that I like
- Most definitely not good for one
- One looks radiant, finding such supporters
- born into the world alive
- - SHOP [give away] + KEEPER [ring]
- Test team moving up the order a US Rastafarian
- You bet two pounds, for example after one
- Dutch river needing not so much sail trimmed, hoisted?
- Ailing state? Indubitably
Buddy explains!

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 I mean?
I noun- The name of the Latin-script letter I.
- The speaker or writer, referred to as the grammatical subject, of a sentence.
- The speaker or writer, referred to as the grammatical object, of a sentence.