Aircraft that might have lost height (3)

I believe the answer is:

mig

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'aircraft' is the definition.
(I have seen 'Russian aircraft ' mean 'mig' so perhaps 'aircraft' could also mean 'mig')

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for mig that I've seen before include "Russian fighter plane" , "Russian aircraft" .)

I've seen this clue in the Evening Standard.

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