Skinny daughter sacrificing anything to be a dedicated swimmer (7)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

LEAN (skinny), D[aught]ER, where aught = anything. Leander in Greek legend was the chap who swam across the Hellespont every summer night to see his love, Hero, but drowned when a winter storm came along, so she drowned herself too. I can’t explain why I knew this trivial story, but I did. If Leander came back after 2022 he could walk over the new bridge, now the longest suspension bridge in the world.