Extremes of emotion in tedious passage, put on (8)
I believe the answer is:
screened
'on' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?
'extremes of emotion in tedious passage' is the wordplay.
'extremes of' means to remove the middle letters (only the letters at the extremes of the word).
'in' indicates putting letters inside.
'tedious passage' becomes 'screed' (I have seen 'long passage' mean 'screed' so perhaps 'passage' could also mean 'screed'. I am not sure about the 'tedious' bit.).
'emotion' with its middle removed is 'en'.
'en' placed inside 'screed' is 'SCREENED'.
'put' is the link.
Can you help me to learn more?
(Other definitions for screened that I've seen before include "Involved in selection process" , "Tested for disease or infection" , "shown on TV" , "Showed a movie" , "broadcast" .)