Crossword Genius

Indefinite article is down to earth (9)

Ross

I believe the answer is:

realistic

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'indefinite' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?

'article is down to earth' is the wordplay.
'article is' can be anagrammed to 'REALISTIC'.
However, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for realistic that I've seen before include "Practicable" , "Practical; true to life" , "Without illusions, dealing in facts" , "Level-headed" , "accurate picture" .)

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