What does the cryptic crossword clue "Covering for a drink? Yes, coat should be shifted (3,4)" mean?

The wordplay uses an anagram. anagram of YES, + COAT = TEACOSY The answer is TEACOSY.

Covering for a drink? Yes, coat should be shifted (3,4)

Daily Mail Cryptic #17101 | 27 Across | 2023-05-19 flower