Moved left welcoming China's leader (7)
I believe the answer is:
excited
'moved' is the definition.
(I've seen this before)
'left welcoming china's leader' is the wordplay.
'left' becomes 'exited' ('exit' can be a synonym of 'leave').
'welcoming' is an insertion indicator (in sense of 'inviting in').
'china's leader' becomes 'c' (I can't justify this - if you can you should believe this answer much more).
'exited' going around 'c' is 'EXCITED'.
Can you help me to learn more?
(Other definitions for excited that I've seen before include "Worked up" , "Very eager and enthusiastic" , "moved by emotion" , "With feelings roused, emotionally high" , "Stimulated" .)