Yet hid son's deceitfulness (10)

I believe the answer is:

dishonesty

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

'deceitfulness' is the definition.
(thesaurus)

'yet hid son's' is the wordplay.
'yet hid son's' anagrams to 'DISHONESTY'.
But, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for dishonesty that I've seen before include "Crookedness" , "Bad behaviour" , "Graft" , "Untrustworthiness, insincerity" , "fraud" .)

I've seen this clue in The Irish News.

Want a hint initially instead of a full solution? Install my app