The story
- Proto-Indo-European*gel-
- Proto-Germanic*kluttaz
- Proto-West Germanic*klott
- Old Englishclott
- Middle Englishclot
- Middle Englishclod
- Middle Englishcloddy
- English todaycloddy
Inherited from Middle English cloddy (“cloddy, clotty”). Doublet of clotty. By surface analysis, clod + y.
Etymology from Wiktionary, CC BY-SA 4.0.