Fan of podcast in French hosted by scientist (8)
I believe the answer is:
listener
'fan of podcast' is the definition.
I can't judge whether this definition defines the answer.
'in french hosted by scientist' is the wordplay.
'in french' becomes 'en' ('in' in French).
'hosted by' means one lot of letters goes inside another.
'scientist' becomes 'lister' (I am not sure about this - if you are sure you should believe this answer much more).
'en' going inside 'lister' is 'LISTENER'.
Can you help me to learn more?
(Other definitions for listener that I've seen before include "Former BBC magazine" , "One following advice" , "one should be able to hear it" , "Auditor" , "Hearer" .)