Losing train of thought visiting Australian bronzed fella (2,1,7)
I believe the answer is:
at a tangent
'losing train of thought' is the definition.
I know nothing about this answer so I can't tell whether this works.
'visiting australian bronzed fella' is the wordplay.
'visiting' becomes 'at'.
'australian' becomes 'A' (common abbreviation).
'bronzed' becomes 'tan' (I've seen this in another clue).
'fella' becomes 'gent' (synonyms).
'at'+'a'+'tan'+'gent'='AT A TANGENT'
Can you help me to learn more?
(Another definition for at a tangent that I've seen is " In a divergent train of thought or action".)