Incomplete WXYZ-Wing
Use a WXYZ-Wing whose pivot lacks the shared digit to find eliminations valid whichever of its three wings contains that digit.
All candidates have been entered in the empty cells.
Cell A is 3, 5, or 6.
If cell A is 3, cell B is 1. If cell A is 5, cell C is 1. If cell A is 6, cell D is 1.
In every case, at least one of cell B, cell C and cell D contains 1. Candidate digit 1 marked × conflicts with 1 in any of these cells and can be removed.