Crossword Genius

Desperately stir acidic bits of crème fraîche? (10)

Ross

I believe the answer is:

diacritics

'bits of creme fraiche?' is the definition.
('creme fraiche' is spelled using diacritic marks)

'desperately stir acidic' is the wordplay.
'desperately' indicates an anagram.
'stir'+'acidic'='stiracidic'
'stiracidic' with letters rearranged gives 'DIACRITICS'.

I've seen this clue in The Independent.
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