Hazard seen in rough and green ... (8)
I believe the answer is:
endanger
'hazard' is the definition.
(thesaurus)
'rough and green' is the wordplay.
'rough' indicates an anagram.
'and'+'green'='andgreen'
'andgreen' with letters rearranged gives 'ENDANGER'.
'seen in' acts as a link.
(Other definitions for endanger that I've seen before include "Put in jeopardy" , "Threaten" , "compromise" , "Pose a threat to" , "Dan Green (anag.)" .)