Element one put into replacement battery (8)

I believe the answer is:

ytterbia

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'element' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see a link between them that I can't see?

'one put into replacement battery' is the wordplay.
'one' becomes 'i' (Roman numeral).
'put into' indicates putting letters inside.
'replacement' indicates anagramming the letters.
'battery' with letters rearranged gives 'ytterba'.
'i' placed into 'ytterba' is 'YTTERBIA'.

Can you help me to learn more?

(Another definition for ytterbia that I've seen is " Burnt out element".)

I've seen this clue in The Guardian.

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