Expedience

This puzzle from an unknown year requires some ingenuity to fill out. Some entries are normal English, and some are in a sort of shorthand which the solver must discover.

a b c d e f g h i j k
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AcrossDown
1a pay for1a omega sequence
1e missiles1b holy breadbox
1i louse1c swallowed a snail
2a sage1e consumes a quantity of beer
2e precedes "T" and "man"1f oil company
2i woodsy1g treatises
3a Datsuns1i what the "Today" show does
3e trade of jiggle TV1j Cosby vehicle
3i NY State nickname1k taunter
4c oceanic piracy (see 4a)4d "...and two _____"
4h Gestapo4h "mutha"
5c diner slang for "none"6a parallels the rhetorical "Am I?"
5h "____ kid!"6b 100 ____ 101
6a shore leave6f yes, yes to Slavs
6e illegitimate heir to musical dynasty 6g cuties
7a head rug6j component of Perrier
7e rushed, Cockney style6k another component of Perrier
7i dance uniform 
8a condition when m is zero and c is apx. 186,000 miles per second 
8e ratty breadline 
8i score with 1 TD and an extra point 
9e Krazy ____