Not allowing to fly with not much training (9)
I believe the answer is:
grounding
'training' is the definition.
(I have seen 'Basic training ' mean 'grounding' so perhaps 'training' could also mean 'grounding')
'not allowing to fly with not much' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'un' (I've seen this in other clues) and 'un' is present in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for grounding that I've seen before include "hampering progress of high flier?" , "keeping home" , "Foundation of basic knowledge" , "Rudimentary knowledge" , "Punishment by parent" .)