Related Clues:

• Thoroughly
• Intensifying word
• To a great extent
• Positively
• 'Indubitably!'
• To a large extent
• To a considerable degree
• ''Without question!''
• 'True, my dear chap'
• Almost, but not ___
• More than 1 Across
• Completely or entirely - be quiet
• Briton's rejoinder
• ''That was __ a surprise''
• 'Indeed, old chap'