Home west of California? His home's way south of there! (4)
I believe the answer is:
inca
'his home's way south of there' is the definition.
The definition suggests a singular noun which matches the answer.
'home west of california?' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'west of' says to put letters next to each other.
'california?' becomes 'ca'.
'in'+'ca'='INCA'
Can you help me to learn more?
(Other definitions for inca that I've seen before include "Old person in race" , "One of an old race of South America" , "Ancient civilisation of Peru" , "Pyramid builders" , "Ancient Andean Indian" .)