Cryptic crossword clue
They reveal lies in old college charts 10

The most common and most likely answer to this crossword clue is the 10 letter word POLYGRAPHS

I've seen this crossword clue in The Daily Telegraph
P
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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.

What does POLYGRAPHS mean?

POLYGRAPHS noun
  1. A device which measures and records several physiological variables such as blood pressure, heart rate, respiration and skin conductivity while a series of questions is being asked to a subject, in an attempt to detect lies.
  2. A mechanical instrument for multiplying copies of a writing, resembling multiple pantographs.
  3. A collection of different works, either by one or several authors.
  4. A group of letters that represent a single phoneme.
POLYGRAPHS verb
  1. To administer a polygraph test to.

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