Barred from leaving (5)
I believe the answer is:
caged
'barred' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for caged that I've seen before include "In a zoo?" , "in prison" , "Shut up" , "Confined behind bars" , "Cooped up" .)