Querida Pata!
„clearance“ is not part of his name, but an expression that we still not know the meaning of
See:
[CLI Part 25] do_TLq2ZyveoZdEF2TBCWnhD - Dokumente - Talk in the Forum of the Arolsen Archives (arolsen-archives.org)
and
[CLI Part 26] do_FWmf8kAUMjGJftq1M73Qq - Dokumente - Talk in the Forum of the Arolsen Archives (arolsen-archives.org)
Kind regards & abraços!