Snake's sibilant signal (4)
I believe the answer is:
hiss
(Other definitions for hiss that I've seen before include "Show disapproval" , "less welcome sign?" , "Make disapproving sound" , "Sound of serpent" , "S-sound of disapproval" .)
I believe the answer is:
hiss
(Other definitions for hiss that I've seen before include "Show disapproval" , "less welcome sign?" , "Make disapproving sound" , "Sound of serpent" , "S-sound of disapproval" .)