Meeting in the course of a country stroll (5)
I believe the answer is:
tryst
'meeting' is the definition.
(I know that tryst is a type of appointment)
'in the course of a country stroll' is the wordplay.
'in the course of' indicates the answer is hidden within the clue.
'TRYST' can be found hidden inside 'country stroll'.
(Other definitions for tryst that I've seen before include "Secret rendezvous between lovers" , "meeting with another person" , "Rendezvous with lover" , "Romantic assignation" , "Romantic meeting" .)