Funny film about case you’ve kept up in the air? (5,2,7)

'funny film' is the definition.
The definition suggests a singular noun which matches the answer.

'about case you've kept up in the air?' is the wordplay.
I cannot quite understand how this works, but
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is found in the answer.
'case' could be 'luggage' (luggage is a kind of case) and 'luggage' is located in the answer.
The remaining letters 'carry' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?