It grows in the street (4)
'it grows' is the definition.
'in the street' is the wordplay.
'in' indicates a hidden word.
'TREE' is hidden in the letters of 'street'.
(Other definitions for tree that I've seen before include "Genealogist's graphic" , "Plant with bark" , "Chestnut or elm?" , "Plane or pine, for example?" , "Big plant" .)
'in the street' is the definition.
I can't judge whether this defines the answer.
'it grows' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'grows' becomes 'ori' (I am not sure about this - if you are sure you should believe this answer much more).
't'+'ori'='TORI'
Can you help me to learn more?
(Other definitions for tori that I've seen before include "rings" , "Large mouldings on columns" , "doughnuts" .)