Related Clues:
- It may be under your hat
- Unknown to but a few
- Antiperspirant brand once advertised as "strong enough for a man"
- Antiperspirant brand once advertised as 'strong enough for a man'
- Kept hidden
- Known by only a few
- Undercover
- Something given, often not to be passed on
- Inner
- Whispered thing
- Hidden, as eight related pieces in the grid
- For only a select few
- Clearance level
- Nothing to write home about?
- Known to few