Where the air is disturbed by a wild gale (7)
I believe the answer is:
algeria
'where the' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'air is disturbed by a wild gale' is the wordplay.
'is disturbed' indicates an anagram.
'by' means one lot of letters go next to another.
'a wild' indicates an anagram.
'air' is an anagram of 'ria'.
'gale' is an anagram of 'alge'.
'ria' after 'alge' is 'ALGERIA'.
Can you help me to learn more?
(Other definitions for algeria that I've seen before include "N. African state" , "Strange regalia of a North African state" , "country in Africa" , "North African country" , "It lies between Morocco and Tunisia" .)