Related Clues:

• Offer as a bonus
• ''___ a heart!''
• Make a contribution
• Write in a postscript, e.g.
• Add casually
• Use a '+'
• ''... to ___ and to hold''
• Calculate the total
• Cookbook directive
• Undergo
• ___ insult to injury
• Contribute, as to the conversation
• Do sum work
• Include, as a tip
• Get a total