She blended Amaretti and another biscuit (8)

I believe the answer is:

marietta

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'she' is the definition.

'blended amaretti and another biscuit' is the wordplay.
'amaretti' can be anagrammed to 'MARIETTA'.
Though, I'm unsure how this is indicated.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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