Foot of old flyer just over half preserved (6)
I believe the answer is:
dactyl
'foot' is the definition.
(I know that dactyl is a type of foot)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for dactyl that I've seen before include "Metrical unit of poetry" , "Foot of three syllables" , "Metrical unit with stressed-unstressed-unstressed syllables" , "Metrical foot" .)