Poet's rewritten sonnet about New York (8)
I believe the answer is:
tennyson
'poet's' is the definition.
(I've seen this before)
'rewritten sonnet about new york' is the wordplay.
'rewritten' indicates anagramming the letters.
'about' is an insertion indicator.
'new york' becomes 'ny'.
'sonnet' with letters rearranged gives 'tenson'.
'tenson' enclosing 'ny' is 'TENNYSON'.
(Other definitions for tennyson that I've seen before include "British poet" , "Alfred Lord ..., Victorian poet" , "linesman" , "Alfred Lord . . . . . . . . great English poet" , "Alfred ........, 19th century English Poet Laureate" .)