A bad act, it follows without saying (5)

I believe the answer is:

tacit

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'without saying' is the definition.
I can't tell whether this definition defines the answer.

'a bad act it follows' is the wordplay.
'a bad' indicates an anagram.
'follows' is a charade indicator (letters next to each other).
'act' anagrammed gives 'tac'.
'tac'+'it'='TACIT'

Can you help me to learn more?

(Other definitions for tacit that I've seen before include "Silent - understood" , "without speaking" , "Implied, unstated" , "Implied without being stated" , "Unvoiced" .)

I've seen this clue in the Evening Standard.

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