Neat extract from poet, Rimbaud (4)
I believe the answer is:
trim
'neat' is the definition.
('trim' can be a synonym of 'neat')
'extract from poet rimbaud' is the wordplay.
'extract from' indicates the answer is hidden within the clue (I've seen this in other clues).
'TRIM' is hidden in the letters of 'poet rimbaud'.
(Other definitions for trim that I've seen before include "edge" , "To change views expediently" , "Neat - prune" , "Neat and orderly" , "Neat and tidy as a town in Meath" .)