Specific taste of macaroni cheese (5)

I believe the answer is:

niche

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'specific taste' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.

'of macaroni cheese' is the wordplay.
'of' indicates a hidden word.
'NICHE' is hidden within 'macaroni cheese'.

Can you help me to learn more?

(Other definitions for niche that I've seen before include "Cosy corner?" , "Place that's cosy" , "Small corner of e.g. market" , "Chine (anag) - suitable place in life" , "Suitable slot" .)

I've seen this clue in The Telegraph.

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