Claim Cu transmuted into another metal (7)

I believe the answer is:

calcium

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'another metal' is the definition.
'calcium' can be an answer for 'metal' (calcium is a kind of metal). I am not sure about the 'another' bit.

'claim cu transmuted' is the wordplay.
'transmuted' indicates an anagram.
'claim'+'cu'='claimcu'
'claimcu' anagrammed gives 'CALCIUM'.

'into' is the link.

Can you help me to learn more?

(Other definitions for calcium that I've seen before include "metal" , "Essential constituent of bones and teeth" , "Element in chalk, milk" , "Bone constituent" , "Metallic element present in limestone" .)

I've seen this clue in The Telegraph.

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