Missile's point raised creating noxious vapours (7)

I believe the answer is:

miasmas

'noxious vapours' is the definition.

'missile's point raised' is the wordplay.
'missile's' becomes 'sams' (abbreviation for surface-to-air missile).
'point' becomes 'aim' (I've seen this before**).
'raised' shows that the letters should be reversed in order.
'sams'+'aim'='samsaim'
'samsaim' in reverse letter order is 'MIASMAS'.

'creating' acts as a link.

(Another definition for miasmas that I've seen is " unpleasant atmospheres".)

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.