Flying conveyance's surface (5)
I believe the answer is:
plane
This could be a double definition.
'flying conveyance's' is the first definition.
'plane' can be an answer for 'conveyance's' (plane is a kind of conveyance). I am not sure about the 'flying' bit.
'surface' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for plane that I've seen before include "Smoother" , "Tool for smoothing wood" , "What imitates bird" , "barked?" , "Flat surface; tree" .)