Hazard in corrupt garden (6)
I believe the answer is:
danger
'hazard' is the definition.
(a hazard is something dangerous)
'corrupt garden' is the wordplay.
'corrupt' indicates anagramming the letters.
'garden' anagrammed gives 'DANGER'.
'in' is the link.
(Other definitions for danger that I've seen before include "Peril, jeopardy" , "Peril in garde" , "Peril, threat" , "Garden (anag) - peril" , "Ranged about in some peril" .)