Item That Seals Off Something; Wall or Fence

This page is the CodyCross answer for the clue below from Circus, Group 95, Puzzle 2 (Antipodism).

Question is: Item That Seals Off Something; Wall or Fence

and the answer is: ENCLOSURE

Word Meaning:

ENCLOSURE — (countable) Something that is enclosed, i.e. inserted into a letter or similar package.

Definitions from Wiktionary.