What does the cryptic crossword clue "Hems can go high for this dress (9)" mean?

The definition is "dress". The wordplay uses an anagram. anagram of HEMS + CAN + GO = CHEONGSAM; definition: "dress" The answer is CHEONGSAM.

Hems can go high for this dress (9)

Independent Cryptic #10874 | 25 Across | 2021-08-19 flower