Something tasteful for which one can hardly have a secret passion (6)
I believe the answer is:
garlic
'passion' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for garlic that I've seen before include "Pungent allium" , "Vegetable" , "Aromatic bulb used as seasoning" , "Strong-tasting bulb" , "Allium sativum" .)