Destroyed copter after moving inert military plane (11)
I believe the answer is:
interceptor
'plane' is the definition.
(interceptor is a kind of plane)
'destroyed copter after moving inert military' is the wordplay.
I cannot quite see how this works, but
an anagram of 'copter' is 'rcepto' which is present in the answer.
an anagram of 'inert' is 'inter' which is within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for interceptor that I've seen before include "Plane or missile perhaps" , "Missile or fighter aircraft" .)