No value keeping in shape (4)
I believe the answer is:
oval
'shape' is the definition.
(oval is a kind of shape)
'no value keeping in' is the wordplay.
'in' indicates a hidden word.
'OVAL' is hidden in the letters of 'no value keeping'.
(Other definitions for oval that I've seen before include "Curved shape" , "Where a duck may be broken" , "form of an egg" , "It's egg-shaped for cricketers" , "Ashes Test venue" .)