Crossword Genius

Hiding the former student’s copper ring (9)

Ross

I believe the answer is:

obscuring

'hiding' is the definition.
(obscuring is a kind of hiding)

'former student's copper ring' is the wordplay.
'former student's' becomes 'OB's' (abbreviation for 'Old Boy').
'copper' becomes 'cu' (chemical symbol).
'obs'+'cu'+'ring'='OBSCURING'

'the' acts as a link.

(Another definition for obscuring that I've seen is " Concealing".)

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