What might be appropriate in the air? (6)
I believe the answer is:
hijack
'appropriate in the air?' is the definition.
'hijack' can be an answer for 'appropriate' (I've seen this before). I'm not sure about the 'in the air?' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hijack that I've seen before include "Take over plane by force in flight" , "Steal en route" , "Illegal activity" , "Illegally commandeer and divert" , "Illegally seize control of (a plane/ship)" .)