Part A - Establish a 1RM Front Squat.

Part B - Using part A to calculate the percentages complete for time: 

15 Squat Cleans @ 45%

12 Squat Cleans @ 50% 

9 Squat Cleans @ 55% 

6 Squat Cleans @ 65% 

3 Squat Cleans @ 75%