Crossword puzzle clue "worked out something"

Worked and worked

Worked out something

Something that's worked up

Not get worked up over something

"Let's try something more melancholy," said Johnny, lowering the E by a semitone. He shook his head. "That's no good either! It would be a ___ if that worked."

Figure something out, especially something obvious

Worked out a sum

Where Einstein worked out relativity