What does the cryptic crossword clue "Type of sleep needed by wounded male in bandage (9)" mean?

The wordplay uses an anagram. anagram of MALE (synonym="MALE") + DRESS (synonym="bandage") = DREAMLESS The answer is DREAMLESS.

Type of sleep needed by wounded male in bandage (9)

Guardian Cryptic #29161 | 6 Down | 2023-08-29 flower