The most common and most likely answer to this crossword clue is the 10 letter word HIEROGLYPH
I've seen this crossword clue in Independent
H
I
E
R
O
G
L
Y
P
H
More clues leading to the result HIEROGLYPH
Buddy explains!
The straight part
We know that "stylised symbol" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case stylised symbol = hieroglyph.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 HIEROGLYPH mean?
HIEROGLYPH noun- An element of an ideographic (hieroglyphic) writing system.
- Any obscure or baffling symbol.
- To represent by hieroglyphs.