Poet is country person admitting blunder (7)
I believe the answer is:
herrick
'poet' is the definition.
(I know that Herrick is a poet)
'country person admitting blunder' is the wordplay.
'country person' becomes 'hick' (informal term for someone who lives in the country).
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'blunder' becomes 'err' (to err is to make a mistake or blunder).
'hick' going around 'err' is 'HERRICK'.
'is' is the link.
(Other definitions for herrick that I've seen before include "Lyric poet" , "Robert --, English poet" , "Gather ye rosebuds poet" .)