Halo is one devout image fusty regulars erased in renovation (5,4)
I believe the answer is:
video game
'renovation' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'halo is one devout image fusty regulars erased' is the wordplay.
I cannot really see how this works, but
'halo' could be 'o' (O resembles a halo) and 'o' is found within the answer.
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is present in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for video game that I've seen before include "entertainment on screen" , "Visual entertainment" .)