Move gran around tree (8)
I believe the answer is:
mangrove
'tree' is the definition.
(mangrove is a kind of tree)
'move gran around' is the wordplay.
'around' is an anagram indicator.
'move'+'gran'='movegran'
'movegran' with letters rearranged gives 'MANGROVE'.
(Other definitions for mangrove that I've seen before include "Evergreen" , "that grows in swamps" , "Swamp tree" , "Shrub" , "one that's swamped?" .)