Almost have chat about flying saucer? (6)
I believe the answer is:
discus
'flying saucer?' is the definition.
(disc made to 'fly' when thrown)
'almost have chat about' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'have chat about' becomes 'discuss'.
'discuss' with its last letter taken away is 'DISCUS'.
(Other definitions for discus that I've seen before include "Sports projectile" , "Olympic field event" , "sports event" , "flat missile" , "Object thrown in athletic event" .)