What does the cryptic crossword clue "A pot uncle shifted to accommodate a melon (10)" mean?

The definition is "melon". The wordplay uses an anagram. anagram of A + POT + UNCLE + A = CANTALOUPE; definition: "melon" The answer is CANTALOUPE.

A pot uncle shifted to accommodate a melon (10)

Daily Mail Cryptic #17082 | 13 Down | 2023-04-24 flower