Man hiding quietly in tree (5)
I believe the answer is:
maple
'tree' is the definition.
(maple is a kind of tree)
'man hiding quietly' is the wordplay.
'man' becomes 'male' (**).
'hiding' indicates putting letters inside.
'quietly' becomes 'p' (p for piano and quiet).
'male' enclosing 'p' is 'MAPLE'.
'in' is the link.
(Other definitions for maple that I've seen before include "Tree of Acer genus" , "Its leaf is the emblem of Canada" , "Tree providing Canada's national emblem" , "Ample (anag.)" , "----- leaf: symbol of Canada" .)