Volcano's sulphur removed from bubbling toxic soap (8)
I believe the answer is:
cotopaxi
'bubbling toxic soap' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'volcano's sulphur removed' is the wordplay.
'volcano's' becomes 'Cotopaxi's' (Cotopaxi is an example).
'sulphur' becomes 'S' (synonyms).
'removed' is a deletion indicator.
'cotopaxis' with 's' taken away is 'COTOPAXI'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for cotopaxi that I've seen before include "Andean peak" , "mountain" , "Ecuadorian hothead" , "volcano in SA" .)