Swiss partner (3)
I believe the answer is:
ham
'swiss partner' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ham that I've seen before include "One of Noah's sons" , "Pork leg" , "Meat served in sandwiches" , "A poor actor - overdoes it" , "Meat of the hog" .)