Sorceress adopting line — one in London? (6)
I believe the answer is:
circle
'one in london?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'sorceress adopting line' is the wordplay.
'sorceress' becomes 'circe' (figure of Greek myth).
'adopting' is an insertion indicator (inserted letters are taken on or adopted).
'line' becomes 'l' (used when specifying particular lines from a poem).
'circe' going around 'l' is 'CIRCLE'.
Can you help me to learn more?
(Other definitions for circle that I've seen before include "Round shape" , "Theatre seating tier" , "Geometric shape" , "overlooked by the gods" , "Clique; loop" .)