Six-footer in a bonnet? (3)
I believe the answer is:
bee
'six-footer in a bonnet?' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
This is all the clue.
Can you help me to learn more?
(Other definitions for bee that I've seen before include "Social insect" , "Honey maker" , "Winged insect" , "See 17" , "Stinging insect" .)