Hearts to Spades Trick Type Invented by Roy Walton

This page is the CodyCross answer for the clue below from Mesopotamia, Group 975, Puzzle 4 (Cultural Influence).

Question is: Hearts to Spades Trick Type Invented by Roy Walton

and the answer is: CARDWARP

Word Meaning:

CARD — A playing card.

Definitions from Wiktionary.