Crossword Genius

Guard in London not following bird (3-5)

Ross

I believe the answer is:

bee-eater

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'bird' is the definition.
(bee eater is a kind of bird)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for bee-eater that I've seen before include "Insectivorous bird" , "Insect-consuming bird" , "Bright avian insectivore" , "Bright bird" .)

I've seen this clue in The Independent.
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