Indiana Jones perhaps loathes a corgi barking (13)
I believe the answer is:
archaeologist
'indiana jones perhaps' is the definition.
I can't tell whether this definition defines the answer.
'loathes a corgi barking' is the wordplay.
'barking' is an anagram indicator (UK slang for mad).
'loathes'+'a'+'corgi'='loathesacorgi'
'loathesacorgi' is an anagram of 'ARCHAEOLOGIST'.
Can you help me to learn more?
(Other definitions for archaeologist that I've seen before include "Excavator of the past" , "One studying past things" , "One who studies past human life through excavation and analysis of artefacts" , "One studying relics from the past" , "Excavating historian" .)