Eastern floral centre (5)
I believe the answer is:
aster
'eastern floral centre' is the definition.
The answer and definition can be both body parts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'eastern floral centre' is the wordplay.
'eastern' becomes 'as' (I can't justify this - if you can you should give a lot more credence to this answer).
'floral' becomes 'patterned' ('patterned' can be similar in meaning to 'floral').
'centre' means to look at the middle letters.
The middle letters of 'patterned' are 'ter'.
'as'+'ter'='ASTER'
Can you help me to learn more?
(Other definitions for aster that I've seen before include "Showy garden flower" , "Flowering plant; tares (anag.)" , "Stare oddly at the flower" , "eg Michaelmas daisy" , "Daisy-like plant" .)