Crossword clues for the word: GRP The word GRP has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for GRP Showing 1 to 9 of 9 results Clue(s) "Aggregation, for short" "Type of rate, for short" Aggregation: Abbr. Assn. or org. Brief assembly? Cluster: Abbr. One might get a pref. rate Org. Org. or assoc.