Tree some hazel, maybe (3)
I believe the answer is:
elm
'tree' is the definition.
(elm tree is a kind of tree)
'some hazel maybe' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'ELM' is hidden in the letters of 'hazel maybe'.
(Other definitions for elm that I've seen before include "Gray's rugged tree (Elegy)" , "Strange tree for Mel" , "Victim of fungus" , "One [TYPE OF TREE]" , "wood used in pelmets" .)