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Put a stop to aluminium boring (5)

Ross

I believe the answer is:

banal

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'boring' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?

'put a stop to aluminium' is the wordplay.
'put a stop to' becomes 'ban' (I've seen this in another clue).
'aluminium' becomes 'al' (Al is the chemical symbol for aluminium).
'ban'+'al'='BANAL'

Can you help me to learn more?

(Other definitions for banal that I've seen before include "tired" , "Trite and insipid" , "Old hat" , "Obvious and boring" , "'Hackneyed, trite (5)'" .)

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