Related Clues:

• Technical writer's guidelines
• Eye glasses, informally
• '___ Wide Shut'
• Colons in emoticons, often
• Spotters?
• Argus’ 100
• Blinkers, at times
• Watches suspiciously
• They can be crossed
• Engineering details
• Colon, in an emoticon
• Eyeglasses, slangily
• Good lookers?
• Sizes up
• Covets, perhaps