Some poem man's classic work (4)
I believe the answer is:
emma
'classic work' is the definition.
(I've seen this before)
'some poem man's' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'EMMA' can be found hidden inside 'poem man'.
(Other definitions for emma that I've seen before include "Austen character" , "Flaubert's heroine" , "Jane Austen heroine" , "Best Actress Oscar winner 1992, for 'Howard's End'" , "Mrs Bovary" .)