It grows in street (4)
I believe the answer is:
tree
'it grows' is the definition.
'in 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 "eg Box" , "Eg, a baobab" , "Beech, for example" , "Plant with bark" , "A number" .)