They stand in the way of progress (9)
I believe the answer is:
obstacles
(Other definitions for obstacles that I've seen before include "hurdles" , "barriers" , "bars" , "These block" , "Hindrances, impediments" .)
I believe the answer is:
obstacles
(Other definitions for obstacles that I've seen before include "hurdles" , "barriers" , "bars" , "These block" , "Hindrances, impediments" .)