Rt

[BongoFury]

Last two, 12A favouring ideal friend for the time being -r-v---o-a-l-, is it provisionally, and 9D spoils hard french husband with metal flower, -a---/m-r-g-l-, something marigold, but what, many thanks

[Fibonacci]

marsh marigold

[Lie-in King]

12a Yes, 'Provisionally' - 'pro' (favouring) + 'vision' (ideal) + 'ally'
9d Marsh marigold - 'mars' (spoils) + 'h(ard)' + 'mari' (Fr. "husband") + 'gold'

[BongoFury]

thanks fibonacci

[BongoFury]

thanks also lie-in-king, for the explanation