What does the cryptic crossword clue "Expose fraudster, we hear, one in extreme position (7)" mean?

The definition is "Expose". The wordplay uses a homophone (sounds like). OUT (expose) + homophone of “liar” The answer is OUTLIER.

Expose fraudster, we hear, one in extreme position (7)

Guardian Cryptic #29352 | 12 Across | 2024-04-09 flower