Okay, many thanks Mattrom - I didn't know "blessed" was part of the name (I just went by Chambers).
I'm still not happy with wordplay though. As far as I can see, the first part tells us that "in entertainment venue, rector (is) nowhere to be found)" - great, that couldn't be clearer, but then there's just a comma followed by "Sturgeon finally" and the definition.
I'm sure you're right Mattrom and "in" covers both the deletion of R and addition of N but it just feels so clunky.
Regardless, a minor quibble in an otherwise thoroughly delightful puzzle.
Thanks again Mattrom, I know you live down under so was hoping you would look in and see my post:-)