The term 'swan song' is a metaphor for a final gesture or performance, often given just before death or retirement. The crossword solutions for this term are 'FINALE' (6 letters), 'FAREWELL' (8 letters), 'COMPLETION' (10 letters), 'END' (3 letters), 'Elisha' (6 letters), 'Last Hurrah' (10 letters), and 'Last Huthurrah' (13 letters). These words all refer to the idea of a final act or performance, which is what the term 'swan song' is meant to represent.