In S.W. Europe, one has to live on fresh air! (6)
I believe the answer is:
iberia
'in s w europe' is the definition.
I can't judge whether this defines the answer.
'one has to live on fresh air' is the wordplay.
'one has to' becomes 'i' (I've seen this in other clues).
'live' becomes 'be' (synonyms).
'on' is an insertion indicator.
'fresh' is an anagram indicator.
'air' is an anagram of 'ria'.
'be' put within 'ria' is 'beria'.
'i'+'beria'='IBERIA'
Can you help me to learn more?
(Other definitions for iberia that I've seen before include "Spain's national flag-carrying airline" , "Where Juan possibly lives" , "Spain and Portugal - airline" , "Great European peninsula containing Spain and Portugal" , "Overpower, overwhelm" .)