Bet storm involves doctor (6)
I believe the answer is:
gamble
'bet' is the definition.
(I know that bet can be written as gamble)
'storm involves doctor' is the wordplay.
'storm' becomes 'gale' (a gale is a windy storm).
'involves' is an insertion indicator.
'doctor' becomes 'MB' (Bachelor of Medicine, Medicinae Baccalaureus).
'gale' going around 'mb' is 'GAMBLE'.
(Other definitions for gamble that I've seen before include "Take a risk" , "Place bets" , "Risky enterprise" , "Wager; sounds like frolic" , "Flutter" .)