50/50 chance: fix sudden descent of aeroplane
I believe the answer is:
tailspin
'descent of aeroplane' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'5050 chance fix sudden' is the wordplay.
I cannot really understand how this works, but
'fix' could be 'pin' (pinning is a kind of fixing) and 'pin' is present in the answer.
The remaining letters 'tails' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for tailspin that I've seen before include "Alpinist (anag) -- state of panic" , "State of rapidly increasing panic" , "Spiral dive of aircraft in trouble" , "Chaotic situation" , "Spiral aeroplane dive" .)