Assignation (5)
I believe the answer is:
tryst
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assignation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tryst that I've seen before include "Date" , "Pre-arranged (secret) meeting" , "Romantic rendezvous (literary)" , "Romantic meeting" , "private appointment" .)