Related Clues:

• The word, as suggested by the saying formed by the ends of this puzzle's four longest answers
• On the q.t
• Not saying anything
• Mother - quiet!
• Parent - shtoom
• Parent (who's kept or is the word!)
• Keep her provided she's a chrysanthemum perhaps
• Silent and unobtrusive
• Tight-mouthed
• (Keep) quiet
• (Keep) silent
• Not a word which ever way you look at it
• (Keep) silent; mother
• Quiet; relative
• Quiet member of the family