Action (4)
'action' is the definition.
(deed is a kind of action)
This is all the clue.
(Other definitions for deed that I've seen before include "Something done" , "What's done" , "A conscious action" , "Heroic exploit" , "Action - legal document" .)
(Other definitions for item that I've seen before include "Boyfriend and girlfriend" , "Single article on a list" , "Two people widely seen as one?" , "Indivual unit" , "Time (anag.)" .)