Possible Clues:

• Panted over unimaginative scholar.
• One who shows off his education
• Dog perhaps bites man, one picking nits?
• Nit-picker gets judo expert in a huff
• This person pays too much attention to formal rules
• Hair-splitter
• Unimaginative person who insists on petty rules
• Person who insists on the rules
• Stickler for the rules
• Pentad (anag.)