Not interfering when one’s making one’s solo takeoff (7,5)

'not interfering' is the definition.
Although both the answer and definition are present participle verbs, I don't understand how one could define the other.

'one's making one's solo takeoff' is the wordplay.
I cannot quite understand how this works, but
'making' could be 'leaving' (leaving is a kind of making) and 'leaving' is located in the answer.
'solo' could be 'alone' (I've seen this in another clue) and 'alone' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

'when' acts as a link.

Can you help me to learn more?