Got in trouble in bar (5)
I believe the answer is:
ingot
'bar' is the definition.
(block of metal, eg a bar of gold)
'got in trouble' is the wordplay.
'trouble' indicates anagramming the letters.
'got'+'in'='gotin'
'gotin' anagrammed gives 'INGOT'.
'in' acts as a link.
(Other definitions for ingot that I've seen before include "Cast metal obtained from a mould" , "Metallic bar" , "Unwrought metal cast in a mould" , "Bar, brick of metal" , "Pig" .)