First of comments on written text in draft (9)
I believe the answer is:
conscript
'draft' is the definition.
(conscripting is a kind of drafting)
'first of comments on written text' is the wordplay.
'first of comments' becomes 'c' (1st letter of 'comments').
'written text' becomes 'script' (I've seen this before).
'c'+'on'+'script'='CONSCRIPT'
'in' acts as a link.
(Other definitions for conscript that I've seen before include "One who hasn't volunteered" , "Compulsorily enlisted person" , "Draft - recruit" , "One compulsorily enlisted" , "Enlist compulsorily" .)