Crossword Genius

Organ grinder somewhere near Epping (5)

Ross

I believe the answer is:

ongar

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'grinder somewhere near epping' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'organ' is the wordplay.
'organ' can be anagrammed to 'ONGAR'.
But, I'm unsure how the anagram is indicated.

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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