Crossword puzzle clue "ancient underground tunnel"

Here are the possible solutions for ancient underground tunnel clue

Answer
Clue
Relevancy
catacomb
Clue
Ancient underground tunnel
Definition
an underground cemetery
adit
Clue
Tunnel
Tunnel.
Mine tunnel.
Colliery tunnel.
Definition
a nearly horizontal shaft to the surface in a mine
aint
Clue
Tiny tunnel builder
airflow
Clue
Wind-tunnel observation
Property tested in a wind tunnel
Definition
a flow of air past a moving vehicle

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