Six-footer in a bonnet? (3)

I believe the answer is:

bee

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

'six-footer' is the definition.
(I know that Bee is a type of six-footer)

I cannot understand how the remainder of the clue works.

(Other definitions for bee that I've seen before include "Social insect" , "Honey maker" , "Winged insect" , "See 17" , "Stinging insect" .)

I've seen this clue in the Evening Standard.

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