Attempt ways for rendezvous (6)
I believe the answer is:
trysts
'rendezvous' is the definition.
(I've seen this in another clue)
'attempt ways' is the wordplay.
'attempt' becomes 'try' (synonyms).
'ways' becomes 'sts' (I've seen this in other clues).
'try'+'sts'='TRYSTS'
'for' is the link.
(Other definitions for trysts that I've seen before include "'Assignations, romantic meetings (6)'" , "dates" , "Lovers' meetings" , "Lover's appointments" , "Lovers' assignations" .)