With 5 Down, a sprayable plastic consisting of a polymer resin, plasticizer, surfactant, and quick-evaporating solvent. Use it to make a mess at birthday parties or, if you're in the military, to find tripwires.
6A
With 5 Down, framework advocated by some physicists seeking to unite quantum mechanics and relativity. Use it for ... who am I kidding, I have no idea!
8A
Spider orchid (the answer is a combination of a common alloy and the postal code for Iowa)
9A
He took Ron's book and wrote a show about Alexander
10A
"Do the Right Thing" pizza shop owner
11A
Tabard ___ (meeting point for Chaucer's pilgrims in "Canterbury Tales")
12A
CPAP prescriber
13A
Org. for men with small, dimpled balls
14A
Gov't provider of retirement and disability benefits