Crosswordiee.com

% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Do some underground exploring:

CAVER: Underground explorer
SPELUNK: Do some underground exploring
SPELUNK: Explore underground
URBANCAVER: Unauthorized underground city explorer
CAVES: Underground areas explored by spelunkers
URBANCAVER: One who recreationally explores sewers and underground tunnels