Chopper door on an aircraft with eight wings (7)
I believe the answer is:
hatchet
'chopper' is the definition.
(something which 'chops')
'door on an aircraft with eight wings' is the wordplay.
'door on an aircraft' becomes 'hatch' (I can't justify this - if you can you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'wings' means to remove the middle letters (the wings or edge letters of the word are used).
'eight' with its middle taken out is 'et'.
'hatch'+'et'='HATCHET'
Can you help me to learn more?
(Other definitions for hatchet that I've seen before include "Short-handled axe" , "Bury this to end quarrel" , "Bury this to make friends again" , "One makes short cuts" , "Small axe with a short handle" .)