go-ahead
Concise Oxford English Dictionary © 2008 Oxford University Press:
go-ahead informal
▶noun (usu. the go-ahead) permission to proceed. ▶adjective
- 1 open to new ideas; enterprising.
- 2 N. Amer. denoting the run or score which gives a team the lead in a game.
'go-ahead' also found in these Oxford entries:

