Comment on article not finished off (8)
I believe the answer is:
annotate
'comment on' is the definition.
(I've seen this in another clue)
'article not finished off' is the wordplay.
'article' becomes 'an' (indefinite article).
'finished off' becomes 'ate' (finished eating).
'an'+'not'+'ate'='ANNOTATE'
(Other definitions for annotate that I've seen before include "Add explanations and comments to (a text)" , "Provide interlinear or marginal comments in a book" , "Mark" , "Add notes to (text)" , "Supply explanatory notes" .)