Writer of note I want to be roughed up (4,5)
I believe the answer is:
mark twain
'writer' is the definition.
(I've seen this before)
'note i want to be roughed up' is the wordplay.
'note' becomes 'mark' (synonyms).
'to be roughed up' indicates an anagram.
'i'+'want'='iwant'
'iwant' with letters rearranged gives 'twain'.
'mark'+'twain'='MARK TWAIN'
'of' is the link.
(Other definitions for mark twain that I've seen before include "Tom had him writing about?" , "Creator of Tom Sawyer and Huckleberry Finn" , ""The Adventures of Huckleberry Finn" author" , "American humorous writer, d. 1910" , "US writer" .)