Miss aunt making waves (8)
I believe the answer is:
tsunamis
'waves' is the definition.
(tsunami is a kind of wave)
'miss aunt making' is the wordplay.
'making' is an anagram indicator.
'miss'+'aunt'='missaunt'
'missaunt' with letters rearranged gives 'TSUNAMIS'.
(Other definitions for tsunamis that I've seen before include "Large ocean waves caused by underwater earthquakes" , "Violent sea waves" , "Destructive sea waves" , "catastrophes" , "Huge destructive waves" .)