Come off? Tin in building set? (7)

I believe the answer is:

meccano

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'set?' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see an association between them that I can't see?

'come off? tin in' is the wordplay.
'off?' is an anagram indicator (I've seen 'off' mean this).
'tin' becomes 'can' (synonyms).
'in' indicates putting letters inside.
'come' anagrammed gives 'meco'.
'meco' going around 'can' is 'MECCANO'.

'building' acts as a link.

Can you help me to learn more?

(Other definitions for meccano that I've seen before include "Plaything" , "Building material" , "It's for kids' building" , "Children's nuts and bolts kit" , "Metal model construction set" .)

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

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