Second person reported a tree (3)
I believe the answer is:
Here is my best explanation:
'a tree' is the definition.
(yew is a kind of tree)
'second person reported' is the wordplay.
'second person' becomes 'you' (I've seen this before).
'reported' shows a homophone (sound like).
'you' sounds like 'YEW'.
(Other definitions for yew that I've seen before include "Churchyard tree", "Longbow wood", "Bow wood", "A tree", "Common churchyard feature", "Coniferous tree", "Wood for bows", "This tree grows in churchyard", "Evergreen tree with narrow dark-green leaves and red berries" and "Tree with red berries".)