Doctor in storm makes bet (6)
I believe the answer is:
gamble
'bet' is the definition.
(I know that bet can be written as gamble)
'doctor in storm' is the wordplay.
'doctor' becomes 'MB' (Bachelor of Medicine, Medicinae Baccalaureus).
'in' indicates putting letters inside.
'storm' becomes 'gale' (a gale is a windy storm).
'mb' placed into 'gale' is 'GAMBLE'.
'makes' is the link.
(Other definitions for gamble that I've seen before include "Take risks" , "Run a risk" , "Risky enterprise" , "Place bets" , "Bet money" .)