TIGHTLIPPED

Taciturn (5-6)

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

• Quick crossword No 16,551 — 2023-05-23 23:00:50
  7D: Reluctant to talk (5-6)
• Quick crossword No 16,348 — 2022-09-28 23:00:20
  12A: Taciturn (5-6)