Individual and unpleasant smell on article (5)
I believe the answer is:
human
'individual' is the definition.
(I know that Human is a type of person)
'unpleasant smell on article' is the wordplay.
'unpleasant smell' becomes 'hum' (hum can mean a disgusting smell).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'article' becomes 'an' (English indefinite article).
'hum'+'an'='HUMAN'
'and' acts as a link.
(Other definitions for human that I've seen before include "Being that's apt to err?" , "Relating to people" , "Relating to a person" , "Relating to mankind" , "Mortal; compassionate" .)