The most common and most likely answer to this crossword clue is the 6 letter word ALEPHS
I've seen this crossword clue in Financial Times
A
L
E
P
H
S
More clues leading to the result ALEPHS
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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.
Crossword Answer definitions
ALEPHS noun- The first letter of the Proto-Canaanite alphabet, and its descendants in descended Semitic scripts, such as Phoenician 𐤀, Aramaic 𐡀, Syriac ܐ, Hebrew א and Arabic ا.