DETAIN

Take into custody (6)

Solution has appeared in 3 crosswords (2 across and 1 down):

• Quick crossword No 16,012 — 2021-08-31 23:00:14
  15A: Keep back (6)
• Quick crossword No 15,538 — 2020-02-25 00:00:34
  7A: Hold up (6)
• Quick crossword No 15,274 — 2019-04-21 23:00:07
  17D: Take into custody (6)