Refuse to get secretaries drink (4,2)
I believe the answer is:
pass up
'refuse' is the definition.
(to pass up on something is to refuse or reject it)
'get secretaries drink' is the wordplay.
'get' is a charade indicator (letters next to each other).
'secretaries' becomes 'PAs' (personal assistants).
'drink' becomes 'sup' (to sup is to drink).
'pas' put next to 'sup' is 'PASS UP'.
'to' acts as a link.
(Other definitions for pass up that I've seen before include "Ignore" , "Refrain from seizing (an opportunity)" , "Showing neglect" , "Miss" , "Neglect (an opportunity)" .)