What does the cryptic crossword clue "Part of air from soprano, grandly making comeback (5)" mean?

The wordplay uses a hidden word. Hidden in reverse of soprNO GRAndly. The noble gas Argon makes up slightly less than 1% of the air The answer is ARGON.

Part of air from soprano, grandly making comeback (5)

Guardian Cryptic #29352 | 20 Across | 2024-04-09 flower

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