Small present reveals wintry conditions (4)

I believe the answer is:

snow

I'm a little stuck... Click here to teach me more about this clue!

'reveals wintry conditions' is the definition.
I can't tell whether this definition defines the answer.

'small present' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'present' becomes 'now' (both can mean the current period).
's'+'now'='SNOW'

Can you help me to learn more?

(Other definitions for snow that I've seen before include "Flakes overhead" , "Ice crystal precipitation" , "Ice flakes" , "that may come at Christmas" , "Jon - - (Ch.4 News)" .)

I've seen this clue in The Daily Express.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.