Sensible points about article (4)
I believe the answer is:
sane
'sensible' is the definition.
(sane can mean sensible or reasonable)
'points about article' is the wordplay.
'points' becomes 'se' (two compass points).
'about' indicates putting letters inside.
'article' becomes 'an' (English indefinite article).
'se' placed around 'an' is 'SANE'.
(Other definitions for sane that I've seen before include "Identical" , "Reasonable" , "Free from mental disorder" , "Compos mentis" , "Normal" .)