Rendezvous in street following experiment (5)
I believe the answer is:
tryst
'rendezvous' is the definition.
(synonyms)
'street following experiment' is the wordplay.
'street' becomes 'st' (abbreviation).
'following' means one lot of letters go next to another.
'experiment' becomes 'try' (I've seen this in other clues).
'st' put after 'try' is 'TRYST'.
'in' is the link.
(Other definitions for tryst that I've seen before include "Romantic assignation" , "where lovers meet" , "Secret assignment" , "cattle-fair" , "private meeting" .)