Feeling movement after start of earthquake (7)
I believe the answer is:
emotion
'feeling' is the definition.
(I know that emotion is a type of feeling)
'movement after start of earthquake' is the wordplay.
'movement' becomes 'motion' (synonyms).
'after' means one lot of letters go next to another.
'start of earthquake' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'motion' after 'e' is 'EMOTION'.
Can you help me to learn more?
(Other definitions for emotion that I've seen before include "Intense feeling" , "sense" , "Agitation of mind" , "Passion" , "Mental agitation" .)