Possible Clues:

• May there anything besides G in with it? The answer's a lemon
• What a century can be for a batsman!
• At home, confined to bed, upset by medicinal preparation
• Invigorating medicine - keynote
• Served with gin, it's a restorative
• Almost too nice to be used as a mixer
• Having nervous trouble hold on - get a pick-me-up
• Soda pop, to some
• Gin and __
• Real eye-opener