What does the cryptic crossword clue "Prepared sociable dinner of no great size (14)" mean?

The definition is "no great size". The wordplay uses an anagram. anagram of SOCIABLE DINNER = INCONSIDERABLE The answer is INCONSIDERABLE.

Prepared sociable dinner of no great size (14)

Guardian Cryptic #29478 | 21 Across | 2024-09-03 flower