Answer: tunnels

AnswerCrossword Clue
TUNNELSSecret passages, maybe
tunnelsTUNNEL, to dig a tunnel
tunnelsAn underground passage dug by a burrowing animal
tunnelsA passage in a sports stadium by which players enter or leave the field
tunnelsAn artificial underground passage, esp. one built through a hill or under a building, road, or river
TUNNELSTravels mole-style
TUNNELSAnt farm features
TUNNELSPlaces for moles
TUNNELSMoles' production
TUNNELSSecret ways
TUNNELSGoes underground
TUNNELSSomething burrowed
TUNNELSSubways.
TUNNELSExcavates, in a way
TUNNELSMole creations
TUNNELSRoads under rivers
TUNNELSCertain escape routes
TUNNELSUnderground routes
TUNNELSSome escape routes