Grover's street (6)
I believe the answer is:
sesame
'grover's street' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sesame that I've seen before include "Seeds used for making oil" , "Plant cultivated for seeds providing oil" , "Seed used in flavouring" , "Open . . . . . . is a magic phrase to gain entry" , "Source of seed and oil" .)