Narrow peninsula (4)
I believe the answer is:
spit
'narrow peninsula' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spit that I've seen before include "Skewer on which meat is roasted" , "Rain in scattered drops" , "Eject saliva - roasting rod" , "Put on skewer" , "Rod used for roasting meat" .)