CREATE TABLE table_name_18 (round__number INTEGER, pick__number VARCHAR(255), position VARCHAR(255), college VARCHAR(255))
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?
    
SQL: SELECT AVG(round__number) FROM table_name_18 WHERE position = "wide receiver" AND college = "clark university" AND pick__number > 166