The most common and most likely answer to this crossword clue is the 9 letter word CAPRICORN
I've seen this crossword clue in The Times
C
A
P
R
I
C
O
R
N
More clues leading to the result CAPRICORN
- Sign top player at last — current seed
- Sign in island attached to maize
- Sign of leader describing M or N
- Problem for walker on island, needing sign
- Agricultural policy fix not good on cereal and butter
- Mediterranean island crop one delivered in early January
- On island forage for goat
- Island’s name put outside my house
- Tropic island’s grain
- Sign for hat, same as worn by Chelsea pensioners for example, but no topper
Buddy explains!
The straight part
We know that "Sign" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sign = capricorn.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.