Tree garden run well in a corporation (9)
I believe the answer is:
arboretum
'tree garden' is the definition.
(I've seen this before)
'run well in a corporation' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'well' becomes 'abore' (I can't justify this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'a corporation' becomes 'tum' ('corporation' is a humorous term for stomach fat).
'r' placed into 'abore' is 'arbore'.
'arbore'+'tum'='ARBORETUM'
Can you help me to learn more?
(Other definitions for arboretum that I've seen before include "area with great growth" , "Botanical tree garden" , "Where planes may be" , "Place for cultivation of 19s" , "Collection of elders, say" .)