Crossword clue: having power or capacity or tendency to absorb or soak up something (liquids or energy etc.)
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a material having capacity or tendency to absorb another substance
having power or capacity or tendency to absorb or soak up something (liquids or energy etc.)