Object displaying kite mark (4)
I believe the answer is:
item
'object' is the definition.
(I've seen this before)
'displaying kite mark' is the wordplay.
'displaying' says the answer is hidden in the clue.
'ITEM' is hidden within 'kite mark'.
(Other definitions for item that I've seen before include "Detail - entry" , "Seperate article in an enumeration" , "Detail (in a list)" , "Boyfriend and girlfriend" , "Individual thing" .)