Put into liquid in Verdun kitchen (4)
I believe the answer is:
dunk
'put into liquid' is the definition.
(to dunk is to dip into liquid)
'in verdun kitchen' is the wordplay.
'in' indicates the answer is hidden within the clue.
'DUNK' can be found hidden inside 'verdun kitchen'.
(Other definitions for dunk that I've seen before include "Immerse (a biscuit)" , "Put into a liquid" , "Submerge in liquid" , "Immerse briefly in a liquid" , "Dip (morsel) in liquid" .)