Here members salute (7,4)
I believe the answer is:
present arms
'salute' is the definition.
(thesaurus)
'here members' is the wordplay.
'here' becomes 'present' ('present' can be similar in meaning to 'here').
'members' becomes 'arms' (arm is a kind of member).
'present'+'arms'='PRESENT ARMS'
(Other definitions for present arms that I've seen before include "Raise a weapon in salute" , "order needed" , "Hold rifle vertically as a salute" , "offer to restore Venus de Milo?" , "Military drill command" .)