Regular soldier? (7)
I believe the answer is:
orderly
I believe this is a double definition.
'regular' is the first definition.
(similar in meaning)
'soldier?' is the second definition.
(I know that orderly is a type of soldier)
(Other definitions for orderly that I've seen before include "Regular - soldier" , "Tidy officer's attendant" , "Hospital attendant - neat" , "Hospital attendant; well behaved" , "Businesslike" .)