Aunt in agony occupied second home at natural elevation (8)
I believe the answer is:
mountain
'natural elevation' is the definition.
(mountain is a kind of natural elevation)
'aunt in agony occupied second home' is the wordplay.
I cannot quite see how this works, but
an anagram of 'aunt' is 'unta' which is within the answer.
'in' is found in the answer.
'second' could be 'mo' (both are short periods of time) and 'mo' is found within the answer.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
'at' acts as a link.
Can you help me to learn more?
(Other definitions for mountain that I've seen before include "Alp" , "Cold - - (film)" , "Natural elevation of the earth's surface" , "High peak" , "high position" .)