What does the cryptic crossword clue "Parliament cites flawed study of good and bad regimes (9)" mean?

The wordplay uses an anagram. anagram of DIET (synonym="parliament") + CITES (synonym="CITES") = DIETETICS The answer is DIETETICS.

Parliament cites flawed study of good and bad regimes (9)

Guardian Cryptic #29280 | 15 Down | 2024-01-16 flower