The prosecutor has to act. See foot of the column (4)
I believe the answer is:
dado
'foot of the column' is the definition.
'dado' can be an answer for 'column' (thesaurus). I am not sure about the 'foot of the' bit.
'the prosecutor has to act' is the wordplay.
'the prosecutor' becomes 'DA' (District Attorney).
'has' says to put letters next to each other.
'to act' becomes 'do' (to do is to act or execute a task).
'da'+'do'='DADO'
'see' is the link.
Can you help me to learn more?
(Other definitions for dado that I've seen before include "Architectural feature" , "Border along an inner wall" , "Decorative wall border" , "Lower part of the wall of a room" , "part of wall specially decorated" .)