After study, it appears that this cut (SU 526) is possibly associated with the construction of hut, but it is worth noting that its position is slightly off the main alignment. Even if there is some variability in the shape and size of these cuts, this set of features can be interpreted as the foundation trench and settings for upright posts that would form a hut or another small structure.
Circular cut for a posthole. Appears to have been cut by SU392, but fills were difficult to distinguish and the situation is unclear.