Sausage in a roll (3,3)
I believe the answer is:
hot dog
'sausage in a roll' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hot dog that I've seen before include "Meat in roll" , "Sausage in a bap" , "Sausage sandwich - acrobatic skier" , "Sausage in breae roll" , "Frankfurter in a roll" .)