The most common and most likely answer to this crossword clue is the 9 letter word THOUSANDS
I've seen this crossword clue in The Daily Telegraph
T
H
O
U
S
A
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S
More clues leading to the result THOUSANDS
- Large number you once found on beach
- You lovely beaches! So many?
- Large numbers, all the same, on posh beach
- Democrat invested in you, without a good deal
- A great many you once observed beside coastal feature
- A raft travelling south carrying pieces from shore?
- Numbers you once found sitting on beach
- Loads you found on beach?
- So In Love? On the contrary with spiritual leader of many
- Primarily top dogs eat it in great quantities
Buddy explains!

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.