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" .)

I've seen this clue in The Telegraph and The Globe and Mail.

Want a hint initially instead of a full solution? Install my app