Forward movement (8)
'forward movement' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for progress that I've seen before include "Advance - promotion" , "Headway" , "Breakthrough - advance" , "Mature" , "Move forwards" .)
(Other definitions for progression that I've seen before include "(Mathematical) sequence" , "Forward motion" , "Gradual advancement" , "Gradual development" .)