The silly fellows may go to Canada! (5)
I believe the answer is:
geese
'the silly fellows' is the definition.
The definition and answer can be both people as well as being plural nouns.
Perhaps there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for geese that I've seen before include "They're seen in a gaggle" , "Edible water birds" , "Web-footed migratory aquatic birds" , "Birds; silly people" , "Ganders" .)