Refine this word faster

Tailback

//ˈteɪlˌbæk// noun

Noun

1
A line of motor vehicles causing or the result of traffic congestion or a traffic jam. Commonwealth, Ireland, UK
"The idea of a British warship supposedly menacing Spain is ludicrous. Is it meant to bomb Cadiz? Will its guns lift a rush-hour tailback 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."
2
(American football) the position of the offensive back on a football team who lines up farthest from the line of scrimmage wordnet
3
A running back or halfback who lines up furthest to the rear in an I formation.
4
(American football) the person who plays tailback wordnet

From tail + back.

Unscramble this word: tailback