Piece of news I encountered on rising (4)
I believe the answer is:
item
'piece of news' is the definition.
(I've seen this before)
'i encountered on rising' is the wordplay.
'encountered' becomes 'met' ('meet' can be a synonym of 'encounter').
'on' says to put letters next to each other.
'rising' is a reversal indicator (going up in a down clue).
'i' after 'met' is 'meti'.
'meti' written backwards gives 'ITEM'.
(Other definitions for item that I've seen before include "Two people considered together (informal)" , "Piece in paper" , "Bit of news to broadcast" , "Feature" , "Unit; detail" .)