Unit (4)
'unit' is the definition.
(item is a kind of unit)
This is all the clue.
(Other definitions for item that I've seen before include "section of magazine" , "Object, detail" , "Component" , "Bit of news to broadcast" , "Individual thing" .)
'unit' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for module that I've seen before include "Standardised part in furniture - or spacecraft" , "Short study course" , "Independent unit in furniture, building etc" , "Detachable sub-unit" , "Complete part (of spacecraft or course)" .)
'unit' is the definition.
(I know that one is a type of unit)
This is the entire clue.
(Other definitions for one that I've seen before include "This is singular" , "Single and undivided" , "Leading cardinal" , "Single person or thing" , "Single, unitary" .)