Sons want less busy time (5)
I believe the answer is:
slack
'less busy time' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sons want' is the wordplay.
'sons' becomes 's'.
'want' becomes 'lack' (synonyms).
's'+'lack'='SLACK'
Can you help me to learn more?
(Other definitions for slack that I've seen before include "Flaccid" , "Idle and disinclined to work" , "skive" , "bits of coal" , "Limp - negligent" .)