Birds: some we see going west (5)

I believe the answer is:

geese

I'm a little stuck... Click here to teach me more about this clue!

'birds' is the definition.
(goose is a kind of bird)

'some we see going west' is the wordplay.
'GEESE' is hidden back-to-front within the letters.
But, I am uncertain how this is indicated.

Can you help me to learn more?

(Other definitions for geese that I've seen before include "Long-necked, migratory aquatic birds" , "Large farm birds" , "Water birds; fools" , "Water birds related to ducks and swans" , "Christmas birds" .)

I've seen this clue in The Sun.

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