Imprisoned those who could all be on strike? (6)
I believe the answer is:
inside
'imprisoned' is the definition.
(I know that imprisoned can be written as inside)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for inside that I've seen before include "Inner surface" , "A sort of job" , "serving porridge" , "undercover" , "Interior - in prison" .)