Socialist in prosperous time shows lack of enthusiasm (7)
I believe the answer is:
boredom
'lack of enthusiasm' is the definition.
The answer and definition can be both feelings as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'socialist in prosperous time' is the wordplay.
'socialist' becomes 'red' (red can informally mean a socialist).
'in' means one lot of letters goes inside another.
'prosperous time' becomes 'boom' (I've seen this in another clue).
'red' placed inside 'boom' is 'BOREDOM'.
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for boredom that I've seen before include "weary idleness" , "Overseers" , "Ennui in bedroom" , "Monotony" , "no interest" .)