Satisfied I picked up article (4)
I believe the answer is:
item
'article' is the definition.
(both can mean an object or thing)
'satisfied i picked up' is the wordplay.
'satisfied' becomes 'met' (as in 'met the conditions of his contract').
'picked up' says the letters should be written in reverse.
'met'+'i'='meti'
'meti' reversed gives 'ITEM'.
(Other definitions for item that I've seen before include "Romantic couple" , "Something on list" , "Object in a list" , "Whole individual unit" , "Object; piece" .)