green·light or green-light 
(grēnlīt′)
(grēnlīt′)tr.v. green·light·ed or green·lit (-lĭt′), green·light·ing, green·lights or green-light·ed or green-lit or green-light·ing or green-lights
Informal
Informal
To give permission to proceed with: "[He] commissioned the pilot that became 'Captain Kangaroo' and greenlighted the series" (Variety).