Bird from Milwaukee (3)
I believe the answer is:
auk
'bird' is the definition.
(auk is a kind of bird)
'from milwaukee' is the wordplay.
'from' says the answer is hidden in the clue.
'AUK' is hidden within 'milwaukee'.
(Other definitions for auk that I've seen before include "Great ---, extinct seabird" , "Black-and-white seabird" , "Northern sea-bird with short narrow wings" , "Short-winged seabird" , "Northern sea bird with short narrow wings" .)