Clue: Like Adam after Eve's arrival, in green mode of existence? (8)
Answer: ECOSTATE
Explanation: Definition: Like Adam after Eve's arrival
ECO STATE; ecostate means "ribless" (from e-, denoting a lack, + costa = rib), though Adam presumably still had most of his left after God "took one of his ribs, and closed up the flesh instead thereof" to make Eve (Genesis 2:21-22)