Magnificent newspaper employee on top of tree (7)
I believe the answer is:
sublime
'magnificent' is the definition.
(I've seen this before)
'newspaper employee on top of tree' is the wordplay.
'newspaper employee' becomes 'sub' (sub is the subeditor of a newspaper).
'on top of' is a charade indicator (letters next to each other).
'tree' becomes 'lime' (type of tree).
'sub'+'lime'='SUBLIME'
(Other definitions for sublime that I've seen before include "Magnificent" , "Wonderful" , "Of the most exalted or noble kind" , "Majestic" , "Glorious; supreme" .)