How clean is clean?

Glossary of difficult words

how clean is clean? - this refers not only to the tender itself, but also to the issue of how clean the contaminated areas must be made in order to meet the terms of the contract;

price tag - literally, the price label on an item for sale; figuratively, the cost of a company, enterprise or undertaking;

vindicated - cleared of blame or suspicion;

to renege - to go back on a promise, undertaking or contract;

to spring something on someone - to present or propose something suddenly or unexpectedly to someone.