Questioned relentlessly (7)
I believe the answer is:
grilled
'questioned relentlessly' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for grilled that I've seen before include "Subjected to intense questioning" , "Cooked - cross-examined" , "Cooked under a flame" , "Cooked under flames" , "Cooked; interrogated" .)