She could get 1lb from Phyllis (5)

I believe the answer is:

sylph

I'm a little stuck... Click here to teach me more about this clue!

'she' is the definition.
Both the answer and definition are singular nouns.
Maybe there's an association between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for sylph that I've seen before include "Thin, graceful woman" , "Slender, graceful female" , "Imaginary (female) being" , "Thin and graceful female" , "Girl with slender figure" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.