Crossword Genius

Starshine somehow loses its shine (9)

Ross

I believe the answer is:

tarnishes

I'm a little stuck... Click here to teach me more about this clue!

'loses its shine' is the definition.
I can't tell whether this definition defines the answer.

'starshine somehow' is the wordplay.
'somehow' is an anagram indicator.
'starshine' anagrammed gives 'TARNISHES'.

Can you help me to learn more?

(Other definitions for tarnishes that I've seen before include "discolorations?" , "stains" .)

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