I'd say that the type of context clue that helps you understand the meaning of the word repining is B. restatement.
If the word is in the middle of the poem, you wouldn't want an explanation or an example, but its synonym in order to understand what that particular word means. At least that is what I believe, I'm sorry if you get this answer wrong. :/
It was discover by 18-year old Marcel Raviadt
