Floyd rang about six-footer (9)
I believe the answer is:
dragonfly
'six-footer' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'floyd rang about' is the wordplay.
'about' indicates anagramming the letters.
'floyd'+'rang'='floydrang'
'floydrang' with letters rearranged gives 'DRAGONFLY'.
Can you help me to learn more?
(Other definitions for dragonfly that I've seen before include "Large hovering insect" , "creature!" , "Large winged insect" , "Insect with two pairs of transparent wings" , "it wings along" .)