Possible Clues:

• Match; tally
• See no need to argue, maybe
• Something opponents may do to do the opposite
• Get along
• Match occupying most of a grassed area
• What a label and an artist have to do
• Marry an ecologist, giving up name
• Silver surfer latterly starts to email -- expats correspond
• Give the thumbs up to a virtual classic
• Accept it's almost a sin