Leaves note attached to article (3)
I believe the answer is:
tea
'leaves' is the definition.
(as in tea leaves)
'note attached to article' is the wordplay.
'note' becomes 'te' (musical note).
'attached to' means one lot of letters go next to another.
'article' becomes 'a' (the indefinite article in English).
'te'+'a'='TEA'
(Other definitions for tea that I've seen before include "Food" , "Shrub; drink" , "Popular drink" , "Tisane" , "Oolong, for example" .)