To Brits It Is a Weatherboard; to Americans a __

This page is the CodyCross answer for the clue below from Farm, Group 477, Puzzle 4 (Plants and Livestock).

Question is: To Brits It Is a Weatherboard; to Americans a __

and the answer is: CLAPBOARD

Word Meaning:

CLAPBOARD — A narrow board, usually thicker at one edge than the other, used as siding for houses and similar structures of frame construction.

Definitions from Wiktionary.