Crossword Genius

Where ignorance is bliss? (5,8)

Ross

I believe the answer is:

fools paradise

I'm a little stuck... Click here to teach me more about this clue!

'where' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.

'ignorance is bliss?' is the wordplay.
'ignorance' becomes 'fools' (I can't justify this - if you can you should believe this answer much more).
'is bliss?' becomes 'paradise' (I've seen this before).
'fools'+'paradise'='FOOLS PARADISE'

Can you help me to learn more?

(Other definitions for fools paradise that I've seen before include "Ill-founded state of happiness" , "Place of happy denial" , "Illusory happiness" , "Deceptively happy state" , "Happy state while ignorant of potential trouble" .)

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