Mind meld?

ESP

Think of the supposed psychic ability that might let someone read another's thoughts without speaking—often linked to paranormal research or sci-fi tropes. It starts with the same letter as "extra.

Mind meld" is a famous phrase from Star Trek where characters like Spock share thoughts by touching someone’s face. The clue plays on this idea of mental connection, hinting at a more general term for perceiving thoughts or communicating without words. That’s where ESP (extrasensory perception) comes in—it’s the real-world concept of reading minds or sensing things beyond normal human abilities. The question mark signals a playful or indirect clue, nudging you toward the abbreviation instead of the literal Star Trek term.