Go over the street to make an appointment (5)
I believe the answer is:
tryst
'an appointment' is the definition.
(tryst is a kind of appointment)
'go over the street' is the wordplay.
'go' becomes 'try' (both can mean an attempt).
'over' is a charade indicator (letters next to each other) (in a down clue, some letters go over others).
'the street' becomes 'st' (abbreviation).
'try'+'st'='TRYST'
'to make' acts as a link.
(Other definitions for tryst that I've seen before include "Romantic meeting" , "Date" , "where lovers meet" , "Secret rendezvous between lovers" , "Rendezvous - assignation" .)