Some cry about enclosing a tree (8)
I believe the answer is:
sycamore
'tree' is the definition.
(I know that Sycamore is a type of tree)
'some cry about enclosing a' is the wordplay.
'about' indicates anagramming the letters.
'enclosing' indicates putting letters inside.
'some'+'cry'='somecry'
'somecry' with letters rearranged gives 'sycmore'.
'sycmore' enclosing 'a' is 'SYCAMORE'.
(Other definitions for sycamore that I've seen before include "Tree, form of maple" , "Type of maple tree" , "The tree is strangely so creamy" , "Tree for the odd Rose Macy" , "Great maple tree" .)