What does the cryptic crossword clue "A part of geese I'd processed (4,2,4,4)" mean?

The wordplay uses an anagram. anagram of APARTOFGEESEID ("A part of geese I'd") [anagram: "processed"] = PATEDEFOIEGRAS The answer is PATEDEFOIEGRAS.

A part of geese I'd processed (4,2,4,4)

Guardian Cryptic #23282 | 27 Across | 2004-10-25 flower