African plain almost peaceful -- get idealistic at first (9)
I believe the answer is:
serengeti
'african plain' is the definition.
(geographic region in Tanzania)
'almost peaceful get idealistic at first' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'peaceful' becomes 'serene' (similar in meaning).
'idealistic at first' becomes 'i' (I can't justify this - if you can you should give a lot more credence to this answer).
'serene' with its last letter taken off is 'seren'.
'seren'+'get'+'i'='SERENGETI'
Can you help me to learn more?
(Other definitions for serengeti that I've seen before include "Tanzanian national park area" , "African ecosystem" , "Tiger seen in Tanzania's great National Park" , "Vast plain" , "Tanzanian wildlife area" .)