Rails about dishonest people (5)

I believe the answer is:

liars

I'm a little stuck... Click here to teach me more about this clue!

'dishonest people' is the definition.
'liars' can be an answer for 'people' (liar is a kind of person). I am not sure about the 'dishonest' bit.

'rails about' is the wordplay.
'about' is an anagram indicator.
'rails' is an anagram of 'LIARS'.

Can you help me to learn more?

(Other definitions for liars that I've seen before include "Tellers of deliberate untruths" , "Prevaricators" , "Deceivers" , "Untruthful people" .)

I've seen this clue in The Mirror.

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