Possible Clues:

• 'You're late; emit it (5,4)'
• 'Finally!'
• "Finally!"
• "At last!"
• Emit, perhaps, what should have been done before
• Not too soon to emit this, perhaps
• Steve Winwood's current album
• What refers to 7 down - and it should have been done before
• Not too soon to emit this, it seems
• Cage none too soon?