Dust storm was rising (5)
I believe the answer is:
devil
'dust storm' is the definition.
(dust devil whirlwind)
'was rising' is the wordplay.
'was' becomes 'lived' (to live is to be).
'rising' shows that the letters should be reversed in order (letters written upwards in a down clue).
'lived' written backwards gives 'DEVIL'.
(Other definitions for devil that I've seen before include "Unsurpassed" , "Beast" , "Imp" , "Old Nick, Satan" , "Fiend" .)