Bar of gold I obtained around noon originally (5)
I believe the answer is:
ingot
'bar of gold' is the definition.
(I've seen this before)
'i obtained around noon originally' is the wordplay.
'obtained' becomes 'got' ('get' can be a synonym of 'obtain').
'around' means one lot of letters goes inside another.
'originally' indicates taking the first letters.
The initial letter of 'noon' is 'n'.
'i'+'got'='igot'
'igot' placed around 'n' is 'INGOT'.
(Other definitions for ingot that I've seen before include "Metal casting" , "Bar, brick of metal" , "A lump of metal like gold" , "Block of precious metal" , "Cast metal obtained from a mould" .)