The ever-widening crack is the line of the crag. A short section of finger crack at the start of the route is the technical crux of the route. Above this, climb a long crack that goes from hands to off width before widening into a squeeze chimney. The entry moves into this chimney are the actual crux for many, and for others, the chimney itself can prove difficult at 5.9.
A #4 BD Camalot or equivalent protects the entry moves into the chimney and it's possible to place a #5 and #6 in the chimney itself, although you will have to leave these behind eventually. In practice it would be difficult to actually fall out of the chimney but failing to make meaningful upward progress is less difficult.
Descent by abseil from the two-bolt anchor at the top of the chimeny (70m rope required).