Answer: piths

AnswerCrossword Clue
PITHS

Essential parts

PITHS

Essences

PITHS

Core substances

PITHS
Cores
PITHS
Marrows.
PITHSOrange centers.
PITHSKernels.
PITHSSoft centers
PITHSGists
PITHSHearts
PITHSMain parts, as of arguments
PITHSQuintessences