... a piece of information following part of one (4)
I believe the answer is:
item
I believe this is a triple definition!
'a piece of information' is the first definition.
(eg a news item)
'following' acts as a link.
'part' is the second definition.
(item is a kind of part)
'of' is a link.
'one' is the third definition.
(I've seen this before)
(Other definitions for item that I've seen before include "Report" , "Two people widely seen as one?" , "Element" , "One thing - two people, perhaps" , "Article, object" .)