Satisfied aluminium is this (5)

I believe the answer is:

metal

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'this' is the definition.
The definition suggests a singular noun which matches the answer.

'satisfied aluminium' is the wordplay.
'satisfied' becomes 'met' ('meet' can be a synonym of 'satisfy').
'aluminium' becomes 'al' (Al is the chemical symbol for aluminium).
'met'+'al'='METAL'

'is' acts as a link.

Can you help me to learn more?

(Other definitions for metal that I've seen before include "Eg, Iron or gold" , "Silver or gold, say" , "Eg, titanium" , "Maybe lead" , "Element eg for road or rail" .)

I've seen this clue in The Telegraph.

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