What does the cryptic crossword clue "Rubbish in middle of ship picked up (5)" mean?

The definition is "Rubbish". The wordplay uses a homophone (sounds like). sounds like WAIST(the middle of a ship) The answer is WASTE.

Rubbish in middle of ship picked up (5)

Times Cryptic #28534 | 26 Across | 2023-02-23 flower