It looks like the brake is currently engaged. You said the brake handle was broken in the fall (and it is missing in the picture you posted). The lever which engages the brake band looks like it is flipped forward, which would mean tension on the band to keep the clutch drum from moving. You could take some pliers or similar and rotate the lever back to disengage the brake band. This would be doing the same thing that happens when you pull back on the brake handle to disengage the brake. If the brake handle is not broken too badly, the handle could also possibly be used to disengage the brake.
See the lever within the red circle and rotate back as shown in the photo.
So, I suspect there is nothing wrong with the clutch on the saw.
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