Called at Rome on the way back, having a sandwich of sausage (10)
I believe the answer is:
mortadella
'sausage' is the definition.
(I've seen this before)
'called at rome on the way back having' is the wordplay.
'having' indicates the answer is hidden within the clue.
'on the way back' says the letters should be written in reverse.
'alledatrom' is hidden in the letters of 'called at rome'.
'alledatrom' in reverse letter order is 'MORTADELLA'.
'a sandwich of' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Another definition for mortadella that I've seen is " Sausage".)