Sentence:  The idea of a British warship supposedly menacing Spain is ludicrous. Is it meant to bomb Cadiz? Will its guns lift a rush-hour <WSD>tailback</WSD> in a colony that most Britons regard as awash with tax dodgers, drug dealers and right-wing whingers? The Gibraltarians have rights, but why British taxpayers should send warships to enforce them, even if just "on exercise", is a mystery. 
Meaning of the word marked with <WSD> tags:  A line of motor vehicles causing or the result of traffic congestion or a traffic jam;  backup.