What does the cryptic crossword clue "Disease-causing organism – track oxygen data (8)" mean?

The definition is "Disease-causing organism". The wordplay uses a charade (building blocks). PATH (synonym of "- track") + O (synonym of "oxygen") + GEN (synonym of "data"); definition: "Disease-causing organism" The answer is PATHOGEN.

Disease-causing organism – track oxygen data (8)

Guardian Cryptic #29250 | 16 Down | 2023-12-11 flower

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