Christmas help, and a hint to what's added to 17-, 28-, 48- and 63-Across 3 letters

Crossword clues for Christmas help, and a hint to what's added to 17-, 28-, 48- and 63-Across 3 letters

Answer	Clue
ELF	Christmas help, and a hint to what's added to 17-, 28-, 48- and 63-Across