Capital of French Guiana (7)
I believe the answer is:
cayenne
'capital of french guiana' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cayenne that I've seen before include "Variety of pepper" , "Pungent red pepper" , "Type of pepper" , "Spice from chillies" , "in kitchen found extremely hot stuff" .)