An old-fashioned blessing can possibly be no sin (7)

I believe the answer is:

benison

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

'an old-fashioned blessing' is the definition.
'benison' can be an answer for 'blessing' (benison is a kind of blessing). I'm not certain of the 'an old-fashioned' bit.

'possibly be no sin' is the wordplay.
'possibly' indicates an anagram.
'be'+'no'+'sin'='benosin'
'benosin' anagrammed gives 'BENISON'.

'can' acts as a link.

Can you help me to learn more?

(Other definitions for benison that I've seen before include "Thanksgiving" , "Benediction" , "Sob, nine turn into a blessing" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.