Mint bar? (5)

I believe the answer is:

ingot

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'mint bar?' is the definition.
(I've seen this in another clue)

'mint bar?' is the wordplay.
'mint' becomes 'ingo' (I am not sure about this - if you are sure you should believe this answer much more).
'bar?' becomes 't' (T-bar is a part of a ski lift).
'ingo'+'t'='INGOT'

Can you help me to learn more?

(Other definitions for ingot that I've seen before include "Lump of gold etc" , "Bar of bullion, for example" , "Precious metal bar" , "Block of cast metal" , "Piece of precious metal" .)

I've seen this clue in The Globe and Mail.

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