What does the cryptic crossword clue "Harness oil at sea for the most part (5,5)" mean?

This cryptic clue uses wordplay to arrive at the answer. Visit the page for progressive hints — definition, wordplay type, and a full step-by-step explanation.

Harness oil at sea for the most part (5,5)

Guardian Cryptic #29677 | 26 Across | 2025-04-24 flower

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