Imprisons one by one, say (7)
I believe the answer is:
interns
'imprisons' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their -s form.
Perhaps you can see a link between them that I don't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for interns that I've seen before include "those confined" , "Hospital residents" .)