The most common and most likely answer to this crossword clue is the 9 letter word SNOWSHOES
I've seen this crossword clue in The Sunday Telegraph
S
N
O
W
S
H
O
E
S
Buddy explains!
The straight part
We know that "They help person to walk after fall in wintry weather" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they help person to walk after fall in wintry weather = snowshoes.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does SNOWSHOES mean?
SNOWSHOES noun- A flat item of footwear worn to facilitate walking in deep snow.
- To travel using snowshoes.