Sticky Sap Substance Used to Make Erasers
Puzzle 8 of Sticky Things Piece of Cake Pack
Question is: Sticky Sap Substance Used to Make Erasers
and the answer is: RUBBER
Word Meaning:
RUBBER — (uncountable, countable) Pliable material derived from the sap of the rubber tree; a hydrocarbon biopolymer of isoprene.
Definitions from Wiktionary.