Crossword Genius

Spy on me getting changed in Knutsford and Peterlee? (7)

Ross

I believe the answer is:

eponyms

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'knutsford and peterlee?' is the definition.
I can't tell whether this definition defines the answer.

'spy on me getting changed' is the wordplay.
'getting' means one lot of letters go next to another.
'changed' indicates an anagram.
'spy'+'on'+'me'='spyonme'
'spyonme' anagrammed gives 'EPONYMS'.

'in' is the link.

Can you help me to learn more?

(Other definitions for eponyms that I've seen before include "Words derived from a person's name" , "Words derived from persons' names" .)

I've seen this clue in The Independent.
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