Top Bit of Trousers, Sometimes Elasticated
Puzzle 16 of Science Fair Projects Piece of Cake Pack
Question is: Top Bit of Trousers, Sometimes Elasticated
and the answer is: WAISTBAND
Word Meaning:
WAISTBAND — A band of fabric encircling the waist, especially a part of a pair of pants or a skirt.
Definitions from Wiktionary.