Related Clues:

• Buttonholes, essentially
• Cat's eyes, at times
• Tailor's vents
• Buttonholes, e.g
• Some vents
• Straight-and-narrow apertures
• Vent features
• Makes a long incision in
• "Cut" British punkers, with "The"
• '70s British "Cut" punkers
• "Cut" London post-punkers
• Buttonholes, really
• Narrow cuts, as in paper
• Mountain climber's piton spots
• Cracks, fissures