What does the cryptic crossword clue "Resistant to cooking hotpot, mostly, and fare that’s stewed (9)" mean?

The wordplay uses an anagram. anagram of HOTPO (synonym="HOTPO") + FARE (synonym="FARE") = HEATPROOF The answer is HEATPROOF.

Resistant to cooking hotpot, mostly, and fare that’s stewed (9)

Guardian Cryptic #29352 | 16 Down | 2024-04-09 flower