Old-fashioned appointment with daughter (5)
I believe the answer is:
dated
'old-fashioned' is the definition.
(dated can mean old-fashioned)
'appointment with daughter' is the wordplay.
'appointment' becomes 'date' (synonyms).
'with' says to put letters next to each other.
'daughter' becomes 'd' (genealogical abbreviation).
'date'+'d'='DATED'
(Other definitions for dated that I've seen before include "Unfashionable" , "Unfashionably old" , "Outmoded" , "Rusty" , "Antiquated" .)