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High-tension power line support (5)

Solution has appeared in 2 crosswords (2 across and 0 down):

• Quick crossword No 15,902 — 2021-04-25 23:00:19
  20A: Steel tower supporting power lines (5)
• Quick crossword No 15,364 — 2019-08-04 23:00:34
  20A: High-tension power line support (5)