Crossword puzzle clue "at each other's fighting"

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

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

The newlywed Siamese fighting fish fed each other ___

At each other's -- (fighting)

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

The other other other woman

Fighting fighting

Bird that has one long talon on each foot for fighting