Winger went to ground easily in the US (4)
I believe the answer is:
dove
'winger' is the definition.
(dove is a kind of bird)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for dove that I've seen before include "Bird representing peace" , "Peacemaker" , "Peace lover; bird" , "Symbol of peace" , "plunged in the Grand Canyon" .)