One involved in assassination in Japan? (5)
I believe the answer is:
ninja
'one involved' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'in assassination in japan?' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NINJA' is hidden in the letters of 'assassination in japan'.
Can you help me to learn more?
(Other definitions for ninja that I've seen before include "Teenage Mutant -- Turtles (TV/film)" , "Expert in espionage" , "Assassins" , "14th-century Japanese soldier of fortune" , "Eastern agent" .)