Hazard from green and rough (8)
I believe the answer is:
endanger
'hazard' is the definition.
(thesaurus)
'green and rough' is the wordplay.
'rough' is an anagram indicator.
'green'+'and'='greenand'
'greenand' is an anagram of 'ENDANGER'.
'from' is the link.
(Other definitions for endanger that I've seen before include "Hazard" , "Put in peril" , "compromise" , "Place into peril, jeopardise" , "Put someone at risk" .)