Drop wrong Kent opener (4)
I believe the answer is:
sink
'drop' is the definition.
(thesaurus)
'wrong kent opener' is the wordplay.
'wrong' becomes 'sin' (I've seen this before).
'opener' says to take the initial letters.
The initial letter of 'kent' is 'k'.
'sin'+'k'='SINK'
(Other definitions for sink that I've seen before include "Subside" , "place of corruption" , "Washing-up place" , "Slump" , "Basin - scupper" .)