How do you remove the inline fuel filter from an AU?

There is a "nipple" looking bolt (circled in red) which holds the clamp holding the inline filter.

How do you take it off?

Or is it possible to take the filter off without having to take this strange looking "bolt" off?

Thanks fellas

Leave the clamp in place. Undo the 2 metal lines (1 on each side) going to the fuel filter, wriggle the fuel line out of the way, slide the fuel filter out of the clamp (it will only slide in one direction - you will see one end has a larger end on it, slide it towards that). I highly recommend purchasing a set of flare nut spanners to undo the line fittings as generally they're tight and a lot of people seem to damage them with shifters and open enders.