The most common and most likely answer to this crossword clue is the 5 letter word TAROT
I've seen this crossword clue in The Times
T
A
R
O
T
More clues leading to the result TAROT
Buddy explains!
The straight part
We know that "fortune-teller's aid" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fortune-teller's aid = tarot.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 TAROT mean?
TAROT noun- (singular or plural) A card game played in various different variations.
- Any of the set of 78 playing cards (divided into five suits, including one of permanent trumps), often used for mystical divination.