Putting into service by ushering her out (5)
I believe the answer is:
using
'putting into service' is the definition.
(I've seen this before)
'ushering her out' is the wordplay.
'out' suggests deleting specific letters.
'ushering' with 'her' removed is 'USING'.
'by' is the link.
(Other definitions for using that I've seen before include "Putting into service" , "Putting to a particular purpose" , "addiction" , "taking drugs" , "practice" .)