Ponder, discuss (6)
I believe the answer is:
debate
I believe this is a double definition.
'ponder' is the first definition.
(I've seen this before)
'discuss' is the second definition.
(I know that debate is a more specific form of the action discuss)
(Other definitions for debate that I've seen before include "Contend" , "Argue the toss" , "Hold public discussion about" , "Discuss; argue" , "A public discussion about a topic" .)