A feeling of eastern movement (7)
I believe the answer is:
emotion
'a feeling' is the definition.
(I know that emotion is a type of feeling)
'eastern movement' is the wordplay.
'eastern' becomes 'e'.
'movement' becomes 'motion' (synonyms).
'e'+'motion'='EMOTION'
'of' acts as a link.
(Other definitions for emotion that I've seen before include "Feeling, say love or hate" , "Passion" , "Feeling such as joy, sorrow and fear" , "reaction" , "Strong feeling as of love or hate" .)