Despicable types of false witness wasting time (6)

I believe the answer is:

swines

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'despicable types' is the definition.
Although both the answer and definition are plural nouns, I don't understand how they can define each other.

'false witness wasting time' is the wordplay.
'false' is an anagram indicator.
'wasting' is a deletion indicator.
'time' becomes 't' (abbreviation).
'witness' with 't' removed is 'winess'.
'winess' with letters rearranged gives 'SWINES'.

'of' is the link.

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I've seen this clue in The Guardian.

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