Lazybones put across rubbish business cases (5,6)
I believe the answer is:
couch potato
'business cases' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'lazybones put across rubbish' is the wordplay.
I cannot really understand how this works, but
'put' could be 'couch' (synonyms) and 'couch' is found within the answer.
'rubbish' could be 'tat' (tat can mean rubbish or poor-quality material) and 'tat' is found within the answer.
The remaining letters 'poo' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for couch potato that I've seen before include "Layabout" , "Lazy person, watching TV too much" , "A continual watcher of TV, videos, etc" , "Telly addict" , "Habitual TV watcher" .)