Possible Clues:

• When the green ones have gone, they're sure to get muddled
• Green beyond what's sure to be hidden
• Being green they're beyond making sure
• Lands used for grazing
• Places to graze
• Not for the present, and that's for sure, they're so green (8)
• The sort of greens that are not good for putting
• Pat's sure to make them green
• They're green for fodder
• Grazing fields