Shape of Kennington? (4)
I believe the answer is:
oval
'shape' is the definition.
(oval is a kind of shape)
'of kennington?' is the wordplay.
'of' becomes 'o''.
'kennington?' becomes 'val' (I can't justify this - if you can you should give a lot more credence to this answer).
'o'+'val'='OVAL'
Can you help me to learn more?
(Other definitions for oval that I've seen before include "Curved shape" , "Easter gift" , "Shape of 25" , "34 [CRICKETER] 's domain" , "not quite round" .)