Notice access outside affected by torrents (8)
I believe the answer is:
cascades
'outside affected by torrents' is the definition.
Although both the answer and definition are plural nouns, I can't understand how one could define the other.
'notice access' is the wordplay.
I cannot quite understand how this works, but
'notice' could be 'ad' (both can mean an advertisement) and 'ad' is found within the answer.
an anagram of 'access' is 'casces' which is located in the left over letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for cascades that I've seen before include "Descending water" , "Falls" , "goes down" , "Waterfalls or downpours" , "Waterfalls, waters rushing down" .)