Curse Rev’s way of projecting hurtful things? (7)

I believe the answer is:
blowgun
'way of projecting hurtful things?' is the definition.
'blowgun' can be an answer for 'way' (blowgun is a kind of way). I'm unsure of the 'of projecting hurtful things?' bit.
'curse rev's' is the wordplay.
'curse' becomes 'blow' (I can't explain this - if you can you should give a lot more credence to this answer).
'rev' becomes 'gun' (I've seen this in another clue).
'blow'+'gun'='BLOWGUN'
Can you help me to learn more?
(Other definitions for blowgun that I've seen before include "Primitive weapon" , "Projectile launcher" .)
