Nymph stoical about circling lake (8)

I believe the answer is:

callisto

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

'nymph' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

'stoical about circling lake' is the wordplay.
'about' indicates an anagram.
'circling' indicates putting letters inside (circling can mean going around or containing).
'lake' becomes 'L' (geographical abbreviation).
'stoical' is an anagram of 'calisto'.
'calisto' enclosing 'l' is 'CALLISTO'.

Can you help me to learn more?

(Other definitions for callisto that I've seen before include "Female reformed to bear" , "nymph revealing > heavenly body" , "moon of Jupiter" , "satellite" .)

I've seen this clue in The Times.

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.