That is a sand fuse These have a different characteristic than a open glass type), you would want to replace with the same style.
I would not simply clip another fuse to this one for "testing", the proper way to test a fuse like this is by using the Ohm setting on a meter.
You need to make sure the TV is unplugged and set your voltmeter to Ohms. Then place one lead on one side of the fuse and the other on the other side.
Meter should show 1 or 2 ohms or less depending on the accuracy of the meter.
If you get no reading at all then the fuse is blown and needs replaced.
To replace the fuse I would suggest removing the old fuse by unsoldering it (the end caps are not holders but are welded to the fuse) and then soldering the new fuse in that place...