I act properly in very truth (8)

I believe the answer is:

veracity

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'truth' is the definition.
(I've seen this in another clue)

'i act properly in very' is the wordplay.
'i' becomes 'a'.
'act properly' becomes 'cit' (I am not sure about this - if you are sure you should believe this answer much more).
'in' means one lot of letters goes inside another.
'a'+'cit'='acit'
'acit' going within 'very' is 'VERACITY'.

Can you help me to learn more?

(Other definitions for veracity that I've seen before include "Exactitude" , "Truth" , "Truthfulness, accuracy" , "Habitual truthfulness" .)

I've seen this clue in the Sydney Morning Herald.

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