Comprehensive, where queen might go? (6,3,5)
I believe the answer is:
across the board
I believe this clue is a double definition.
'comprehensive' is the first definition.
(thesaurus)
'where queen might go?' is the second definition.
(chess piece)
(Other definitions for across the board that I've seen before include "Where a queen might move" , "Going over the ship's side" , "How chess players see each other" , "generally" , "how chess players view each other?" .)