Bar disheartened architect finally left (5)

I believe the answer is:

ingot

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'bar' is the definition.
(block of metal, eg a bar of gold)

'disheartened architect finally left' is the wordplay.
'disheartened' suggests removing the centre (the middle or heart is removed).
'architect' becomes 'inigo' (I've seen this before).
'finally left' becomes 't' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'inigo' with its centre taken out is 'ingo'.
'ingo'+'t'='INGOT'

Can you help me to learn more?

(Other definitions for ingot that I've seen before include "Moulded metal bar" , "Mass of precious metal" , "Lump of gold etc" , "Seize quickly; steal" , "Bar, brick of metal" .)

I've seen this clue in The Times.

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