Risk (9)
There are a few possibilities for this:
speculate
'risk' is the definition.
(I know that risk can be written as hazard)
This is the entire clue.
(Other definitions for hazard that I've seen before include "Something dangerous, such as black ice?" , "Difficulty" , "Jeopardy as on golf course" , "Golf course obstacle" , "Danger, risk - perhaps on golf course" .)
'risk' is the definition.
(I know that risk can be written as danger)
This is the entire clue.
(Other definitions for danger that I've seen before include "Red flag, for example" , "'Peril, risk (6)'" , "Garden (anag) - peril" , "Menace" , "Peril, hazard" .)
'risk' is the definition.
(I know that risk can be written as gamble)
This is all the clue.
(Other definitions for gamble that I've seen before include "Take a risk" , "Take risks" , "Bet -- Procter's partner" , "Run a risk" , "Bet; risky undertaking" .)
'risk' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for speculate that I've seen before include "As before, observe" , "Gamble on investments" , "Gamble - guess" , "Form opinion without definite knowledge" , "Buy in hope of profit, but with risk of loss" .)