Calf's state (3,6)
I believe the answer is:
new jersey
This clue is a double definition.
'calf's' is the first definition.
(Jersey is a type of cow)
'state' is the second definition.
(I know that New Jersey is a American state)
(Other definitions for new jersey that I've seen before include "The Garden State" , "change of clothing" , "Newark's state" , "Unused pullover" , "US state; seasonal gift?" .)