Broken boot-tree found in the garden (8)
I believe the answer is:
beetroot
'the garden' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'broken boot-tree' is the wordplay.
'broken' indicates anagramming the letters.
'boot'+'tree'='boottree'
'boottree' anagrammed gives 'BEETROOT'.
'found in' is the link.
Can you help me to learn more?
(Other definitions for beetroot that I've seen before include "Vegetable cooked or used in salads and pickles" , "Food" , "Dark red root eaten as a vegetable" , "vegetable's produced" , "salad ingredient" .)