Crossword Genius

No yacht could be something travelling faster than light (7)

Ross

I believe the answer is:

tachyon

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'something travelling faster than light' is the definition.
I can't judge whether this defines the answer.

'no yacht could be' is the wordplay.
'could be' indicates anagramming the letters.
'no'+'yacht'='noyacht'
'noyacht' is an anagram of 'TACHYON'.

Can you help me to learn more?

(Another definition for tachyon that I've seen is " One moving faster than light".)

I've seen this clue in The Independent.
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