Ingredient Saga reader mixed with rum (8,5)

I believe the answer is:

demerara sugar

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'ingredient' is the definition.
I know nothing about this answer so I can't tell whether this works.

'saga reader mixed with rum' is the wordplay.
'mixed with' is an anagram indicator.
'saga'+'reader'='sagareader'
'sagareader' with its letters anagrammed with 'rum' makes 'DEMERARA SUGAR'.

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(Other definitions for demerara sugar that I've seen before include "Light brown sweetener, originally from Guyana" , "Cane product" , "Brown sweetener from Caribbean" , "plantation crop" .)

I've seen this clue in The Telegraph.

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