Crossword puzzle clue "meant for each other"

Besties who also literally hate each other's guts but we're besties but we hate each other so much it hurts sometimes

Meant (for each other?)

They're meant for each other

Like each answer in this puzzle - also each word in each clue - in length

"I meant what I said, and I said what I meant" author

Kind of commercial pact where two countries agree to treat each other as well as any other

The other other other woman

Early, or a hint to where each half of each starred answer can be found