Try stiletto (4)
I believe the answer is:
stab
I believe this is a double definition.
'try' is the first definition.
(I've seen this in another clue)
'stiletto' is the second definition.
(thesaurus)
(Other definitions for stab that I've seen before include "Jab" , "Thrust at and pierce" , "Inflict wound with knife" , "Pierce with pointed weapon" , "Sudden sharp pain" .)