Flying log? (5)
I believe the answer is:
caber
'flying log?' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
This is the entire clue.
Can you help me to learn more?
(Other definitions for caber that I've seen before include "Heavy pole" , "Pole tossed as a test of strength" , "Pole thrown" , "Highland Games event" , "Tree trunk tossed in sport" .)