Fifth Year Master's

This puzzle is a capstone. It uses the structure of the hunt (but not any of the puzzle answers).
You've done 11 concentrations during your time here… but something was missing from each of them.
If you add that missing piece, you'll be able to learn something new.
Your roommate has been outperforming you in every class. What do you need to finally surpass Blueno?
DepartmentCourse Code
BusinessBacteria or viruses
HumanitiesGradually narrow
MathInsular religious sects
Performing ArtsThe way in
Physical SciencesCity-ish
RISDCreased, or having an inner layer
Social SciencesEnclosed, or reconnoitered
Things to Learn
Renounce a belief
Rendering worse, through addition
Transmitted on a subscription television
Gives up hope
Sums that fund research
Swiss cereal
People who cultivate plants to sell
Silhouettes
Track for aspiring doctors
Detector
Ornamental lining in architecture

20 guesses left