For a change, slip into slacks! (5)
I believe the answer is:
idles
'slacks' is the definition.
The definition and answer can be both to do with social activities as well as being verbs in their -s form.
Maybe there's an association between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for idles that I've seen before include "Of engine, just ticks over in neutral" , "Avoids working" , "Lazes about, just ticks over" , "Wastes time" , "Does little, just ticks over" .)