Incompetent record in tin production (5)
I believe the answer is:
inept
'incompetent' is the definition.
(similar in meaning)
'record in tin production' is the wordplay.
'record' becomes 'EP' (abbreviation for extended play record).
'in' indicates putting letters inside.
'production' is an anagram indicator.
'tin' with letters rearranged gives 'int'.
'ep' put within 'int' is 'INEPT'.
(Other definitions for inept that I've seen before include "Maladroit" , "Blundering" , "Standard required in a piece of work (colloq.)" , "Foolish" , "Hopeless; bungling" .)