Where eruptions may start to burst? (4)
I believe the answer is:
peru
'where eruptions may start to burst?' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
This is the entire clue.
Can you help me to learn more?
(Other definitions for peru that I've seen before include "South American country" , "Country of Lima, Cuzco and Paddington Bear" , "Lima's country" , "South American state" , "Homeland of Paddington Bear" .)