Hold up progress, stymie (9)
I believe the answer is:
stonewall
This clue is a double definition.
'hold up progress' is the first definition.
(I've seen this before)
'stymie' is the second definition.
(I know that stonewall is a type of stymie)
(Other definitions for stonewall that I've seen before include "delay in parliament" , "Refuse to co-operate" , "Play to defend" , "Stand firm" , "Delay or block (a proposal's) progress" .)