Poet one introduced to Eliot, initially, around spring (7)

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

Eliot was Thomas Stearns knows as T S, “around” is S T, insert I (one), add WELL for spring. There were three Sitwell siblings who wrote, but Edith was the poetic one; I’m not likely to read their works but I have visited their stately “pile” at Renishaw Hall near Sheffield, which has some nice paintings.