What does the cryptic crossword clue "Small present which we hardly ever get at Xmas? (4)" mean?

The definition is "Small". The wordplay uses a charade (building blocks). S (synonym="small") + NOW (synonym="present") = SNOW The answer is SNOW.

Small present which we hardly ever get at Xmas? (4)

Independent Cryptic #11525 | 28 Across | 2023-09-19 flower