Intellect Wren potentially manifested round house's east wing (7)
I believe the answer is:
egghead
'intellect' is the definition.
(egghead is a kind of intellect)
I cannot understand how the rest of the clue works.
(Other definitions for egghead that I've seen before include "may take a bashing at the breakfast table" , "Ovoid-shaped intellectual" , "brain" , "Very clever person" , "where soldiers may take a dip?" .)