What does the cryptic crossword clue "Stuff washed ashore did for two in a bad state (9)" mean?

The wordplay uses an anagram. anagram of DID + FOR + TWO = DRIFTWOOD The answer is DRIFTWOOD.

Stuff washed ashore did for two in a bad state (9)

Daily Mail Cryptic #17071 | 5 Down | 2023-04-07 flower