Crossword clue: the lowermost portion of a structure partly or wholly below ground level; often used for storage

The most common answer is basement (8 letters).

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

Possible answers

basement 8 letters wn-def

the lowermost portion of a structure partly or wholly below ground level; often used for storage

cellar 6 letters wn-def

the lowermost portion of a structure partly or wholly below ground level; often used for storage