Passionate fellow captivated by contents of erotica (8)
I believe the answer is:
romantic
'passionate' is the definition.
(I've seen this in another clue)
'fellow captivated by contents of erotica' is the wordplay.
'fellow' becomes 'man' (fellow can mean a man).
'captivated by' means one lot of letters goes inside another.
'contents of' means to look at the middle letters (the letters on the inside of the word).
The middle letters of 'erotica' are 'rotic'.
'man' inserted within 'rotic' is 'ROMANTIC'.
(Other definitions for romantic that I've seen before include "Literary period in early 19th century" , "Fantastic" , "Soulful or amourous idealist" , "Inclined to love" , "Sentimental" .)