Oriental flower in middle of Battenberg (7)
I believe the answer is:
eastern
'oriental' is the definition.
('eastern' can be a synonym of 'oriental')
'flower in middle of battenberg' is the wordplay.
'flower' becomes 'aster' (aster is a kind of flower**).
'in' indicates putting letters inside.
'middle of' indicates the central letters.
The middle of 'battenberg' is 'en'.
'aster' placed inside 'en' is 'EASTERN'.
(Other definitions for eastern that I've seen before include "Asian" , "Nearest (anag) - oriental" , "towards the sun" , "Could be Chinese" , "Possibly Japanese" .)