short necklace (6)
I believe the answer is:
choker
'short necklace' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for choker that I've seen before include "A high stiff collar or tight-fitting necklace" , "Close-fitting band round neck" , "Ornamental neckband." , "Tight necklace, collar" , "Tight necklet - sportsman that wilts under pressure" .)