Sleigh jingler (4)
I believe the answer is:
bell
'sleigh jingler' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for bell that I've seen before include "eg Big Ben" , "Buzz" , "Alternative to knocker" , "The frigate Lutine's hangs in Lloyd's of London" , "It's struck by a hammer or clapper" .)