Pungent red pepper (7)
I believe the answer is:
cayenne
'pungent red pepper' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cayenne that I've seen before include "Former French penal colony - pepper" , "Capital of French Guinea" , "Pungent red pepper" , "Capital of French Guiana - spicy red pepper" , "Hot red spice" .)