tapclue
nounUK /ˈtæpkluː/
US /ˈtæpkluː/
A tapclue is a little hint you get by tapping something.
She tapped the box and found a tapclue that helped her open it.
OTHER MEANINGS
2. A soft tapping sound that tells you something is near.
The tapclue on the window told us the bird had landed.
3. A secret signal made by tapping to help a friend in a game.
He gave a tapclue under the table so his teammate knew the answer.
4. A small mark you tap to reveal a hidden message.
Tap the tapclue on the screen to see the next riddle.