Feature I encountered on rising (4)
I believe the answer is:
item
'feature' 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' shows that the letters should be reversed in order (going up in a down clue).
'i' after 'met' is 'meti'.
'meti' back-to-front is 'ITEM'.
(Other definitions for item that I've seen before include "Report" , "Article, object" , "Bit of information" , "newspaper article" , "Single unit" .)