Kidnap a seaman in China (8)
I believe the answer is:
shanghai
This might be a double definition.
'kidnap a seaman' is the first definition.
'shanghai' can be an answer for 'kidnap' (shanghaiing is a kind of kidnaping). I am not sure about the 'a seaman' bit.
'in china' is the second definition.
('Shanghai' is part of 'china')
Can you help me to learn more?
(Other definitions for shanghai that I've seen before include "Press men at one time" , "force on board ship" , "Asian port" , "Dragoon" , "Trick someone into joining a ship's crew unwillingly (in China?)" .)