Germany welcomes top flier (6)
I believe the answer is:
glider
'flier' is the definition.
(I have seen 'quiet flier' mean 'glider' so perhaps 'flier' could also mean 'glider')
'germany welcomes top' is the wordplay.
'germany' becomes 'ger' (I've seen this in other clues).
'welcomes' indicates putting letters inside (in sense of 'invites in').
'top' becomes 'lid' (lid is a kind of top).
'ger' enclosing 'lid' is 'GLIDER'.
(Other definitions for glider that I've seen before include "Kind of aircraft without an engine" , "Motorless plane" , "taking flight?" , "Powerless traveller" , "craft without power" .)