Muffler spot (4)
I believe the answer is:
neck
'muffler spot' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for neck that I've seen before include "Cut of meat" , "A hard one shows some nerve" , "It's risky to stick it out" , "sink" , "Impudence - canoodle" .)