I revisited this site on 15/9/26.
Having compared the feature I found to Lidar, I now believe it to be a distinct feature not directly related to the Causewayed Enclosure, but I have identified its exact location on What Three Words, which enables me to conclude that the path I previously said runs between the inner and outer banks, actually runs along the outer ditch of the outer bank.
I am relabelling the relevant pictures accordingly.
Took a walk around the woods on Offham Hill today.
One of the paths goes straight through the remains of the Neolithic Causwayed Enclosure, much of which was destroyed by a Victorian chalkpit.
To the south are two Bronze Age round-barrows, which are often found near such Neolithic sites in this neck of the woods.
The area is heavily overgrown, but there may be traces of the Enclosure banks on the narrow paths that pass through the space.
Having overlaid the archaeological image of the Enclosure over the OS map, this definitely bears more investigation.