What does the cryptic crossword clue "Regrettably icy moment, representative of the bigger picture (9)" mean?

The wordplay uses an anagram. anagram of ICY (synonym="ICY") + MOMENT (synonym="MOMENT") = METONYMIC The answer is METONYMIC.

Regrettably icy moment, representative of the bigger picture (9)

Guardian Cryptic #29527 | 11 Across | 2024-10-30 flower