Clerk as unruly and apathetic type (7)

I believe the answer is:
slacker
'type' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for slacker that I've seen before include "One evading responsibility" , "Person avoiding work" , "One shirking work" , "Not as tight" , "less tense" .)
