Answer: orifice

AnswerCrossword Clue
ORIFICE

Opening

ORIFICE

Anatomical aperture

ORIFICE

Perforation.

ORIFICE
Aperture.
ORIFICE
Opening.
ORIFICEMouth of a clam
ORIFICEAperture
ORIFICEHole in the head
ORIFICEVent, e.g.
ORIFICEPore, e.g.
ORIFICEHole in the head?