Poet of a popular kind (6)
'poet' is the definition.
(I've seen this before)
'of a popular kind' is the wordplay.
'of' indicates the answer is hidden within the clue.
'LARKIN' can be found hidden inside 'popular kind'.
(Other definitions for larkin that I've seen before include "English poet, 1922-85", "Big Jim ..., trade unionist", "Philip ---, C twenty English poet", "Cab", "English poet, d. 1985".)