House Chinese military guards (4)
I believe the answer is:
semi
'house' is the definition.
(I've seen this before)
'chinese military guards' is the wordplay.
'guards' indicates a hidden word.
'SEMI' can be found hidden inside 'chinese military'.
(Other definitions for semi that I've seen before include "House attached to one other" , "half would do!" , "Prefix denoting half" , "Common type of house" , "One house of pair" .)