Bird base in Newfoundland (6)
I believe the answer is:
gander
'bird' is the definition.
(male goose)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for gander that I've seen before include "male member of the Anatidae family" , "Ranged about with male goose" , "town in Newfoundland" , "waterbird" , "Male goose - quick look" .)