What does the cryptic crossword clue "For whom sea trip proves villainous? (7)" mean?

The wordplay uses an anagram. anagram of SEA (synonym="SEA") + TRIP (synonym="TRIP") = PIRATES The answer is PIRATES.

For whom sea trip proves villainous? (7)

Guardian Cryptic #29683 | 22 Across | 2025-05-01 flower