Wicket perhaps finally suggesting skulduggery (4)
I believe the answer is:
gate
I believe this is a double definition.
'wicket perhaps' is the first definition.
(wicket is a kind of gate)
'finally suggesting skulduggery' is the second definition.
(the -gate suffix is used in names of scandals)
(Other definitions for gate that I've seen before include "Box office take" , "It may be barred" , "Barrier, exit" , "Movable opening" , "Attendance figure" .)