Historical clue formulations

• Approve — 2023-04-30
• Give the go-ahead — 2018-12-24
• Give it a go? — 2015-01-31
• Voice one's approval — 2014-06-04
• Give the go-ahead — 2011-05-12
• Agree verbally — 2011-04-27
• Give permission — 2009-12-07
• Give the go-ahead — 2009-01-26
• Give permission — 2000-06-19
• Agree — 1996-11-03