Discern interference in remains of blaze (7)

I believe the answer is:

cinders

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'in remains of blaze' is the definition.
I can't tell whether this definition defines the answer.

'discern interference' is the wordplay.
'discern' anagrams to 'CINDERS'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for cinders that I've seen before include "Pieces of partly burned coal" , "Embers" , "girl kept at home" .)

I've seen this clue in the Sydney Morning Herald.

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