What does the cryptic crossword clue "Mere hut is shaking and most affected by cold say (9)" mean?

The wordplay uses an anagram. anagram of MERE HUT IS = RHEUMIEST The answer is RHEUMIEST.

Mere hut is shaking and most affected by cold say (9)

Independent Cryptic #11893 | 10 Down | 2024-11-21 flower