Cook rarely grasps ladies' fingers (4)
I believe the answer is:
okra
'ladies' fingers' is the definition.
(I've seen this before)
'cook rarely grasps' is the wordplay.
'grasps' indicates a hidden word.
'OKRA' is hidden within 'cook rarely'.
(Other definitions for okra that I've seen before include "Tropical plant with edible pods" , "Ladies' fingers with edible pods" , "vegetable soup ingredient" , "Lady's fingers; gumbo; bhindi" , "Long green tropical vegetable" .)