He has taking ways with people (9)
I believe the answer is:
'he has taking ways with people' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he' is the wordplay.
I cannot really understand how this works, but
'he' could be 'nap' and 'nap' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for kidnapper that I've seen before include "Holder of a person for ransom" , "criminal" , "Captor of a human being, for ransom" , "Ransom demander" , "One who seizes" .)