__ Moran, an Aide to Professor Moriarty
Puzzle 4 of Sherlock Holmes Hard Pack
Question is: __ Moran, an Aide to Professor Moriarty
and the answer is: COLONEL
Word Meaning:
COLONEL — A commissioned officer in an armed military organization, typically the highest rank before flag officer ranks (generals). It is generally found in armies, air forces or naval infantry (marines).
Definitions from Wiktionary.