The term 'play the siren' is a metaphor for using charm and attraction to draw someone in. The crossword solutions for this term are ENTICE (6 letters), LURE (4 letters), SEDUCE (6 letters), and TEMPT (5 letters). ENTICE means to attract or draw in with something desirable, while LURE implies a more subtle form of persuasion. SEDUCE implies a more overt attempt to draw someone in, and TEMPT implies an offer that is difficult to resist. All of these words refer to the same concept of using charm and attraction to draw someone in.