Nail on gammy foot, on reflection seems somewhat pinkish-white (8)

I believe the answer is:

magnolia

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'white' is the definition.
(I have seen 'Pinkish white' mean 'magnolia' so perhaps 'white' could also mean 'magnolia')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for magnolia that I've seen before include "Creamy colour" , "Early-blooming tree; off-white colour" , "Fragrant blooms might strangely gain loam" , "Miss Hawks in Show Boat" , "A shade" .)

I've seen this clue in The Irish Times.

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