Shut up shop, but don't dash! (4)
I believe the answer is:
coop
'shut up' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for coop that I've seen before include "Birdcage" , "pound" , "Cage for poultry" , "Hens in this" , "Pen" .)