Virtuous person in funny clothing, maybe a knight (7)

I believe the answer is:

quester

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

'clothing maybe a knight' is the definition.
I can't judge whether this defines the answer.

'virtuous person in funny' is the wordplay.
'virtuous person' becomes 'st' (saint).
'in' indicates putting letters inside.
'funny' becomes 'queer' (synonyms).
'st' put into 'queer' is 'QUESTER'.

Can you help me to learn more?

I've seen this clue in The Guardian.

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