Sweet made famous by the town of Montelimar in the Rhone Valley (6)
I believe the answer is:
nougat
(Other definitions for nougat that I've seen before include "Chewy nutty sweet" , "Chewy confection with nuts, fruit, etc" , "Honeyed sweet" , "Sweet made from honey, nuts, sugar, etc" , "Chewy sweet made of egg-white, nuts and sugar" .)