Rubbish cold drink some sent back (8)
I believe the answer is:
claptrap
'rubbish' is the definition.
(thesaurus)
'cold drink some sent back' is the wordplay.
'cold drink' becomes 'clap' (I've seen this in other clues).
'some' becomes 'part'.
'sent back' shows that the letters should be reversed in order.
'part' written backwards gives 'trap'.
'clap'+'trap'='CLAPTRAP'
(Other definitions for claptrap that I've seen before include "Utter rubbish" , "Bull" , "Stuff and nonsense" , "Meaningless nonsense" , "Contrived but foolish talk" .)