The most common and most likely answer to this crossword clue is the 9 letter word RHYMESTER
I've seen this crossword clue in The Guardian
R
H
Y
M
E
S
T
E
R
More clues leading to the result RHYMESTER
- Poet closing parts of number with very dodgy metres
- Poet from Maidenhead almost set off in posh car
- Would-be poet met merry with sherry!
- Lyricist of “Sherry Met Sally”
- Society’s taken in by the merry, dissolute versifier
- Would-be poet met, merry with sherry
- Versifier's endless song penned by one taking it easy
- Poet, republican, reinterpreted myths about eastern queen
Buddy explains!

The straight part
We know that "Poet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case poet = rhymester.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 RHYMESTER mean?
RHYMESTER noun- A rhymer; a poetaster