Soldiers give up fresh rasmalai for sausage (6)
I believe the answer is:
salami
'sausage' is the definition.
(salami is a kind of sausage)
I don't understand how the rest of the clue works.
(Other definitions for salami that I've seen before include "Cured meat" , "meat product" , "Highly seasoned fatty sausage" , "Garlic- flavoured sausage" , "Savoury snack" .)