The most common and most likely answer to this crossword clue is the 10 letter word SWEEPSTAKE
I've seen this crossword clue in The Times
S
W
E
E
P
S
T
A
K
E
More clues leading to the result SWEEPSTAKE
- Society greets secure form of lottery
- Cries, opening post: lucky win here?
- Part of fence catching small rider in Grand National lottery?
- Rushes through to grab a draw
- Chimney cleaner’s earnings are a bit if a lottery
- Batsman’s shots win bets pooled by gambling syndicate
- Chimney workers win lottery
- Gamble money earned from cleaning chimneys?
- Race to have tiny addition to letter put in post
- Keen to get aboard ship and win lottery
Buddy explains!

The straight part
We know that "form of lottery" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case form of lottery = sweepstake.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 SWEEPSTAKE mean?
SWEEPSTAKE noun- A lottery in which the prize or prizes constitute all the money paid by the participants.
- A prize draw.