Landscape viewed, reportedly (5)
I believe the answer is:
scene
'landscape' is the definition.
(I've seen this in another clue)
'viewed reportedly' is the wordplay.
'viewed' becomes 'seen' (to view is to see).
'reportedly' shows a homophone (sound like).
'seen' sounds like 'SCENE'.
(Other definitions for scene that I've seen before include "Landscape; public display of anger" , "Landscape; part of act" , "Subdivision of a drama" , "Part of Hamlet" , "Picture" .)