What cattle feed on in Switzerland (7)
I believe the answer is:
lucerne
'in switzerland' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for lucerne that I've seen before include "Fodder plant, alfalfa" , "Clover-like plant used for fodder" , "clover?" , "Alfalfa - Swiss lake and resort" , "ake" .)