Stiletto or dirk (6)
I believe the answer is:
dagger
I believe this is a double definition.
'stiletto' is the first definition.
(thesaurus)
'dirk' is the second definition.
(I've seen this in another clue)
(Other definitions for dagger that I've seen before include "Stabbing weapon" , "that has an incisive point" , "Hand weapon" , "''Is this a ... which I see before me'' (Macbeth)" , "Macbeth's weapon" .)