Related Clues:

• Santa's sackload
• Things from a registry
• Contributes (or creates this puzzle's theme)
• Checks the check
• Kicks in
• Works a kakuro puzzle
• Goes on to say
• Has a summer job?
• Pipes in
• Throws in the mix
• Does some kindergarten math
• Santa’s load
• Follows a recipe, say
• Uses the '+' function
• Does sum work