What does the cryptic crossword clue "Smell caused by oxygen surfacing from bed of Porto's river (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.

Smell caused by oxygen surfacing from bed of Porto's river (5)

Telegraph Cryptic #31202 | 2 Down | 2026-04-01 flower

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