Eddy is one at orgy in Barking (8)
I believe the answer is:
gyration
'eddy' is the definition.
The answer and definition can be both related to natural events as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'one at orgy in barking' is the wordplay.
'barking' indicates an anagram ('barking' can informally mean mad).
'at'+'orgy'+'in'='atorgyin'
'atorgyin' is an anagram of 'GYRATION'.
'is' is the link.
Can you help me to learn more?
(Other definitions for gyration that I've seen before include "Circular motion" , "Turning" , "Spin" , "Tory gain (anag) - revolution" , "Going round" .)