Cup supporter (6)
I believe the answer is:
saucer
'cup supporter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for saucer that I've seen before include "If it's flying, it's a UFO" , "alien craft?" , "It may be flying or on the table" , "less than a plate?" , "Shallow dish, flying?" .)