International detectives in domestic murder? (8)
I believe the answer is:
homicide
'murder?' is the definition.
('homicide' can be a synonym of 'murder')
'international detectives in domestic' is the wordplay.
'international' becomes 'i' (abbreviation eg in IMF).
'detectives' becomes 'cid'.
'in' indicates putting letters inside.
'domestic' becomes 'home' ('home' can be similar in meaning to 'domestic').
'i'+'cid'='icid'
'icid' inserted inside 'home' is 'HOMICIDE'.
(Other definitions for homicide that I've seen before include "The killing of one human by another" , "Murder (mainly US)" , "Serious crime" , "Manslaughter or murder" , "The killing of a human (mainly US)" .)