Crossword Genius

Ghostly greeting (3)

Ross

I believe the answer is:

boo

'ghostly greeting' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for boo that I've seen before include "Make one's dislike heard" , "Shout of dislike" , "Show displeasure orally" , "Express noisy disapproval" , "Voice disapproval" .)

I've seen this clue in the King Feature Syndicate.
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