Some graced a rubber tree (5)
I believe the answer is:
cedar
'tree' is the definition.
(cedar tree is a kind of tree)
'some graced a rubber' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'CEDAR' can be found hidden inside 'graced a rubber'.
(Other definitions for cedar that I've seen before include "Tall conifer" , "Tree (Lebanese?)" , "Raced around noble tree" , "Evergreen tree" , "Great hardwood tree associated with Lebanon" .)