Type of coffee, according to hearsay, that can stimulate desire (7)

I believe the answer is:
philtre
This could be a double definition.
'type' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'coffee according to hearsay that can stimulate desire' is the second definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'of' is the link.
Can you help me to learn more?
(Other definitions for philtre that I've seen before include "It makes you love" , "Love-potion" , "Exciting drink" , "Magic love potion" .)
