Interrogated (9)
'interrogated' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for grilled that I've seen before include "Cooked - cross-examined" , "Cooked by radiant heat" , "Cooked; questioned" , "Cross-questioned - cooked" , "Cooked under flames" .)
(Other definitions for debriefed that I've seen before include "Gathered info on return from a mission, from a soldier say" , "Questioned after completing a mission" .)
(Another definition for pumped that I've seen is " Forced (a fluid) to move".)