The following sentences and phrases share an unusual quality. Can you determine what it is?

1. IT'S APPARENT HE'S ESKIMO.
2. NO MASTER IS KINDER.
3. A DAMPER SANDAL
4. FOUND A SHELTER
5. A PICCOLO NEEDED

HINT:
Each clue conceals a related word.

Answer:

1. it's apPARENT HE'S ESkimo  ( )
2. no mASTER IS Kinder  *
3. a dAMPER SANDal  &
4. founD A SHelter  -
5. a picCOLO Needed  : 

Credit: NY Times Crossword - Mar. 29, 1992
Ernst Theimer
SYMBOLS