Seductress (5)
I believe the answer is:
siren
'seductress' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for siren that I've seen before include "Loud whistle or sailors' enchantress" , "Loud whistle or dangerous woman" , "Dangerously fascinating woman" , "Vamp; alarm" , "Bewitching singer" .)