Green, and rough being hazard (8)
I believe the answer is:
endanger
'being hazard' is the definition.
(I've seen this before)
'green and rough' is the wordplay.
'rough' indicates an anagram (a rough or broken ordering of the letters).
'green'+'and'='greenand'
'greenand' anagrammed gives 'ENDANGER'.
(Other definitions for endanger that I've seen before include "Threaten" , "Jeopardize" , "Put someone at risk" , "Expose to injury or extinction" , "compromise" .)