Crossword Clue:

One of four in a Scrabble set

AnswerCrossword Clue
RACKOne of four in a Scrabble set
XTILEThere's only one in a Scrabble set
TYREOne of a set of four on a London taxi
ESSESLetters in a Scrabble set.
TILESThere are 100 in a Scrabble set
QUARTILEStatistical dividing point in a four-group data set