One going with the wind – conceited, reportedly (4)
I believe the answer is:
vane
'one going with the wind' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'conceited reportedly' is the wordplay.
'conceited' becomes 'vain' (synonyms).
'reportedly' indicates a 'sounds like' (homophone) clue.
'vain' is a homophone of 'VANE'.
Can you help me to learn more?
(Other definitions for vane that I've seen before include "Turbine blade" , "Weather blade" , "It shows wind direction" , "Indicator of wind direction" , "Fin attached to the tail of an arrow" .)