Found no character had uprightness (9)

'uprightness' is the definition.
(I know that uprightness can be written as erectness)

'found no character' is the wordplay.
I cannot quite understand how this works, but
'found' could be 'erect' (I've seen this in another clue) and 'erect' is present in the answer.
'no' could be 'n' (common abbreviation) and 'n' is located in the answer.
'character' could be 'ess' (the letter S) and 'ess' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'had' is the link.

Can you help me to learn more?