Smoking a family out can be bad for health (4)
I believe the answer is:
smog
'bad for health' is the definition.
The definition and answer can be both states of affairs as well as being singular nouns.
Maybe there's an association between them I don't understand?
'smoking a family out' is the wordplay.
'a family' becomes 'kin' (synonyms).
'out' suggests deleting specific letters.
'smoking' with 'kin' removed is 'SMOG'.
'can be' acts as a link.
Can you help me to learn more?
(Other definitions for smog that I've seen before include "Fog polluted by smoke" , "Fog and smoke mix" , "Pollution fog" , "Bad visibility caused by emissions from chimneys" , "Industrially polluted air" .)