Kick around family that's failing (7)

I believe the answer is:

tanking

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'failing' is the definition.
The answer and definition can be both related to change as well as being present participle verbs.
Perhaps they are linked in a way I don't understand?

'kick around family' is the wordplay.
'kick' becomes 'tang' (a strong taste or smell).
'around' is an insertion indicator.
'family' becomes 'kin' (synonyms).
'tang' going around 'kin' is 'TANKING'.

'that's' acts as a link.

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I've seen this clue in The Guardian.

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