How many letters does the top answer for “any thick, viscous matter” have?

The most common answer is goo (3 letters).

Crossword clue: any thick, viscous matter

5 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

goo 3 letters wn-def

any thick, viscous matter

gook 4 letters wn-def

any thick, viscous matter

guck 4 letters wn-def

any thick, viscous matter

gunk 4 letters wn-def

any thick, viscous matter

slime 5 letters wn-def

cover or stain with slime