Crossword clues for the word: SNEAKSUP The word SNEAKSUP has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for SNEAKSUP Showing 1 to 7 of 7 results Clue(s) ___ on (comes unobtrusively). "Moves on tiptoe, perhaps" "Surprises, with ""on""" Approaches furtively. Approaches very quietly Approaches with stealth Creeps closer.