Crossword puzzle clue "valuable tunnel"

Here are the possible solutions for valuable tunnel clue

Answer
Clue
Relevancy
mine
Clue
Valuable tunnel
Definition
to dig for valuable materials
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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