Howl before individual finally thrust blade (7)
I believe the answer is:
bayonet
'blade' is the definition.
(I know that bayonet is a type of blade)
'howl before individual finally thrust' is the wordplay.
'howl' becomes 'bay' (I've seen this in another clue).
'before' is a charade indicator (letters next to each other).
'individual' becomes 'one' (an individual is one person).
'finally' says to take the final letters.
The last letter of 'thrust' is 't'.
'bay'+'one'+'t'='BAYONET'
(Other definitions for bayonet that I've seen before include "Stabbing weapon" , "Blade fixed to a rifle" , "Knife fixed to the end of a rifle" , "Neat boy (anag.)" , "Kind of knife attached to a rifle" .)