Adhesive Made From the Air Bladders of Fish
Puzzle 10 of Recycling Medium Pack
Question is: Adhesive Made From the Air Bladders of Fish
and the answer is: ISINGLASS
Word Meaning:
ISINGLASS — A form of gelatine obtained from the air bladder of the sturgeon and certain other fish, used as an adhesive and as a clarifying agent for wine and beer.
Definitions from Wiktionary.