noun
Used in legal or formal contexts to refer to the basis for an accusation or suspicion. Often appears in set phrases like かどで逮捕される (arrested on suspicion of ...).
彼は窃盗のかどで逮捕された。
He was arrested on suspicion of theft.
そのかどで彼は解雇された。
He was dismissed on those grounds.
容疑 is the more common word for 'suspicion' in criminal contexts, while かど is a formal, somewhat literary term for the grounds or charge itself.
The historical derivation is uncertain; the kanji 廉 is conventionally associated with the meaning of 'grounds' or 'reason' in legal contexts.