Writer says it's difficult following end of sentence (8)
I believe the answer is:
essayist
'writer' is the definition.
(essayist is a kind of writer)
'says it's difficult following end of sentence' is the wordplay.
'difficult' is an anagram indicator.
'following' is a charade indicator (letters next to each other).
'end of' says to take the final letters.
The final letter of 'sentence' is 'e'.
'says'+'its'='saysits'
'saysits' anagrammed gives 'ssayist'.
'ssayist' put after 'e' is 'ESSAYIST'.
(Other definitions for essayist that I've seen before include "Writer of shorter pieces" , "Writer of pieces on various subjects" , "Writer of short compositions" , "I write" , "The venturer" .)