What does the cryptic crossword clue "Genial postman at work in Warwickshire town (10,3)" mean?

The definition is "town". The wordplay uses an anagram. anagram of GENIAL + POSTMAN = LEAMINGTONSPA; definition: "town" The answer is LEAMINGTONSPA.

Genial postman at work in Warwickshire town (10,3)

Daily Mail Cryptic #17242 | 19 Across | 2023-12-04 flower