Peruvian mail-sorting centre (4)

I believe the answer is:

lima

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

'centre' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'peruvian mail-sorting' is the wordplay.
'mail' anagrams to 'LIMA'.
However, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for lima that I've seen before include "Peruvian capital" , "Mail to Peru'd capital" , "Edible bean; capital city" , "Kind of bean" , "Mail to Peru's capital" .)

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.