This ahead for person taking over? Unlikely (6,3)
I believe the answer is:
bowler hat
'this ahead for person taking over? unlikely' is the definition.
The definition suggests a singular noun which matches the answer.
'this ahead for person' is the wordplay.
I cannot really see how this works, but
'person' could be 'bowler' (bowler is a kind of person) and 'bowler' is located in the answer.
The remaining letters 'hat' 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?
(Other definitions for bowler hat that I've seen before include "traditional topping" , "Headgear with round crown" , "Derby" , "weapon in a Bond film?" , "Domed headgear" .)