Ogilvie regularly disembarked the German aircraft (6)
I believe the answer is:
glider
'aircraft' is the definition.
(glider is a kind of aircraft)
'ogilvie regularly disembarked the german' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'disembarked the german' becomes 'der' (I can't explain this - if you can you should give a lot more credence to this answer).
The alternating letters of 'ogilvie' are 'gli'.
'gli'+'der'='GLIDER'
Can you help me to learn more?
(Other definitions for glider that I've seen before include "Engineless aircraft" , "craft without power" , "Sailplane" , "Plane supported by air" , "quiet flier" .)