Spanish arrangement of carols (6)

I believe the answer is:

carlos

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'spanish arrangement' is the definition.
The definition suggests a singular noun which matches the answer.

'of carols' is the wordplay.
'of' is an anagram indicator (the answer comes from or 'of' the letters).
'carols' anagrammed gives 'CARLOS'.

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(Other definitions for carlos that I've seen before include "Don --, Verdi opera" , "Highly-seasoned sausage" .)

I've seen this clue in the Evening Standard.

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