Nominal inheritance, misguided on my part (8)

I believe the answer is:

patronym

'nominal inheritance' is the definition.
(name inherited from one's father)

'misguided on my part' is the wordplay.
'misguided' indicates anagramming the letters (letters guided into the wrong places).
'on'+'my'+'part'='onmypart'
'onmypart' anagrammed gives 'PATRONYM'.

I've seen this clue in The Times.

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