Bright yellow spice (8)
'bright yellow spice' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for turmeric that I've seen before include "Condiment that dyes yellow" , "kitchen ingredient" , "Yellow powder used in Indian cookery" , "Yellow spice used in curry" , "It's hot" .)
(Other definitions for saffron that I've seen before include "Flavouring derived from a species of crocus" , "Golden yellow" , "Orange-yellow colour" , "The stigma" , "Flavouring from a kind of crocus" .)