WELCOME to LMF....
Check if it is getting 12 volts at the clutch...
If it has 12 volts, Give it a new Good ground path... if it still will not engage the clutch windings are open.
The most common cause of failure is bad electrical connections... (that usually leads to intermittent engagement and over heated, burnt clutch)..
If your clutch winding is open or short, or slipping. You will have to replace it... KennyV