種たね明あかし

noun, noun or participle which takes 'suru', intransitive verb

revealing how a trick is done

Specifically refers to explaining the secret behind a magic trick, illusion, or deceptive performance.

• マジシャンが手て品じなの種たね明あかしをしてくれた。

  The magician revealed how the trick was done.

noun, noun or participle which takes 'suru', intransitive verb

disclosure of a secret; exposure; explanation

Broader use: revealing the hidden cause, background, or mechanism behind something, not limited to tricks.

• 彼かれの成せい功こうの種たね明あかしは、地じ道みちな努ど力りょくだった。

  The secret behind his success was steady hard work.