RADAR

Electronic detection system (5)

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

• Quick crossword No 16,640 — 2023-09-04 23:00:14
  20A: Palindromic system for determ­ining an object's location (5)
• Quick crossword No 15,189 — 2019-01-12 00:00:24
  18D: Electronic detection system (5)