Rightful

The answer to the crossword question “Rightful is LEGAL” is likely the word “legitimate.” Legitimate means conforming to laws or rules, hence making it legal or rightful. It refers to something that is lawful, justifiable, and reasonable. The word rightful itself means having a just or legal claim or possession, so it is closely related to the idea of legitimacy. Therefore, the phrase “rightful is legal” can be interpreted as meaning that something is only considered rightful if it is in accordance with the law, which would make it legitimate.