Bird plunged in LA (4)
I believe the answer is:
dove
This could be a double definition.
'bird' is the first definition.
(dove is a kind of bird)
'plunged in la' is the second definition.
'dove' can be an answer for 'plunged' (I've seen this in another clue). I'm not certain of the 'in la' bit.
Can you help me to learn more?
(Other definitions for dove that I've seen before include "Symbol of peace" , "plunged in the Grand Canyon" , "Bird representing peace" , "Peaceful type" , "Bird; advocate of peace" .)