Tree smashed lamp (4)
I believe the answer is:
palm
'tree' is the definition.
(I know that palm is a type of tree)
'smashed lamp' is the wordplay.
'smashed' is an anagram indicator.
'lamp' anagrammed gives 'PALM'.
(Other definitions for palm that I've seen before include ""trophy"" , "Obscure" , "Tropical tree with large leaves" , "Tropical tree or part of hand" , "Inner surface of the hand" .)