The term "most clerkish" can be replaced with several different synonyms depending on the context. For instance, if you are referring to someone who is overly concerned with rules and formalities, you might use words like "rigid," "pedantic," or "dogmatic." Similarly, if you are describing a person who is overly bureaucratic or bureaucratic in their thinking, you might use words like "circular," "procedural," or "red-tape." Other synonyms for "most clerkish" might include words like "stodgy," "conventional," or "staid." Ultimately, the choice of synonym will depend on the situation and the specific meaning you are trying to convey.