Unleavened bread atop dish of fermented milk (7)

I believe the answer is:

matzoon

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'dish of fermented milk' is the definition.
The definition suggests a singular noun which matches the answer.

'unleavened bread atop' is the wordplay.
'unleavened bread' becomes 'matzo' (synonyms).
'atop' becomes 'on'.
'matzo'+'on'='MATZOON'

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I've seen this clue in The Independent.

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