What does the cryptic crossword clue "Downtrodden machine worker? (7)" mean?

The definition is "Downtrodden machine worker?". The wordplay uses a charade (building blocks). TREADLE (synonym of "Downtrodden machine worker?") The answer is TREADLE.

Downtrodden machine worker? (7)

Telegraph #30653 | 27 Across | 2024-06-29 flower

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Guardian Cryptic #26502 (2015-02-23)