1. The horse-fly or gad-fly.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• cleag,
• xleg,
• vleg,
• dleg,
• ckeg,
• cpeg,
• coeg,
• clwg,
• clsg,
• cldg,
• clrg,
• clleg,
• clege,
• clegge,
• clegs,
• ceeg,
• claig,
• clyg,
• clieg,
• Claege

• Clough,
• clause,
• clog,
• Cleek,
• clx,
• clxx,
• cloggy,
• clouse,
• claque,
• close,
• clagg,
• clegg,
• cloche,
• claeys,
• clique,
• cloze,
• cliche.

The adjective form of the word "cleg" is "cleggy".

The plural of the "cleg" can be the "clegs".

The singular of the "cleg" can be the "cleg".