Scornful cry (3)
I believe the answer is:
bah
'scornful cry' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bah that I've seen before include "Exclamation of disgust or annoyance" , "''... Humbug'' Scrooge's cry" , "''...! Humbug!'' (Scrooge)" , "Disbelieving expression" , "Exclamation of contempt or disgust - Scrooge used to say it" .)