Possible Clues:

• In a way it's obvious that it's 1.50, before time
• Head of college left prematurely, evidently
• A century and a half is too soon, obviously
• Beyond question
• It's obviously too soon after 1.50, perhaps
• 'It should be obvious, ...'
• "No kidding"
• Conservative soon eclipsing left, without doubt
• Many in good time plainly seen
• Obviously; with clarity