Post a couple of applications (11)
I believe the answer is:
appointment
'post' is the definition.
(I've seen this before)
'a couple of applications' is the wordplay.
'a couple of applications' can mean two substitutions for 'application'.
'application' becomes 'app'.
'application' becomes 'ointment' (I've seen this before).
'app'+'ointment'='APPOINTMENT'
(Other definitions for appointment that I've seen before include "German city" , "Date" , "Job, position" , "Engagement" , "Meeting" .)