A danger or risk (6)
I believe the answer is:
hazard
I believe this clue is a double definition.
'a danger' is the first definition.
(I know that hazard is a type of danger)
'risk' is the second definition.
(I know that risk can be written as hazard)
(Other definitions for hazard that I've seen before include "Venture" , "Something dangerous, such as black ice?" , "Endanger, jeopardize" , "Golf course obstacle" , "Obstruction feature on a golf course" .)