SCHEMA:
CREATE TABLE table_name_18 (round__number INTEGER, pick__number VARCHAR, position VARCHAR, college VARCHAR)
USER:
What is the average round number with wide receiver as position and Clark University as the college and the pick number is bigger than 166?

QUERY:
SELECT AVG(round__number) FROM table_name_18 WHERE position = "wide receiver" AND college = "clark university" AND pick__number > 166