- - Contingent arrangement
- - Safety net, of a sort, and a literal feature of 17-, 23-, 39- and 52-Across
- - Safety option
- - It's often labeled 'B'
- - "Just in case" strategy, and a hint to a hidden letter sequence in 17-, 24-, 37- and 52-Across
- - It's just in case
- - Alternate strategy
- - Just-in-case strategy
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