Area's cultivated to accommodate very good shrub (7)
I believe the answer is:
spiraea
'shrub' is the definition.
(thesaurus)
'area's cultivated to accommodate very good' is the wordplay.
'cultivated' indicates an anagram.
'to accommodate' means one lot of letters goes inside another.
'very good' becomes 'pi' (I've seen this in other clues**).
'areas' with letters rearranged gives 'sraea'.
'sraea' going around 'pi' is 'SPIRAEA'.
(Other definitions for spiraea that I've seen before include "rosaceous plant" , "rose shrub" , "rosy flower" .)