It grows within street (4)
I believe the answer is:
tree
'it grows' is the definition.
'within street' is the wordplay.
'within' says the answer is hidden in the clue.
'TREE' can be found hidden inside 'street'.
(Other definitions for tree that I've seen before include "Chestnut or elm?" , "Stand for mugs" , "Diagram representing different relationships" , "box, possibly" , "Eg, elm or oak" .)