Shining silver rubbish (8)

I believe the answer is:

aglitter

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'shining' is the definition.
Both the definition and answer are adjectives. Maybe you can see a link between them that I don't see?

'silver rubbish' is the wordplay.
'silver' becomes 'Ag' (Ag is the chemical symbol for silver).
'rubbish' becomes 'litter' (litter is a kind of rubbish).
'ag'+'litter'='AGLITTER'

Can you help me to learn more?

(Other definitions for aglitter that I've seen before include "Shiny" , "Sparkling with light" .)

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

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