Nero sprawled on his couch in a toga? (7)
I believe the answer is:
enrobed
'in a toga?' is the definition.
I can't judge whether this definition defines the answer.
'nero sprawled on his couch' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'nero' is 'enro' which is present in the answer.
'couch' could be 'bed' (I've seen this before) and 'bed' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for enrobed that I've seen before include "Ceremonially dressed" , "Formally dressed" .)