Wherein one is laid to rest alongside German? (6)
I think what Azed is intending here is that the clue should function as an '&lit', with the 'one' in the clue who is 'laid to rest alongside [a] German' identifying the solution.
Although 'wherein' cannot be a pronoun in the &lit reading, its inclusion (required by the wordplay) renders the clue deeply unsatisfactory.