Right, leave the plane quickly, loser! (6)

I believe the answer is:

reject

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'right leave' is the definition.
'reject' can be an answer for 'leave' (thesaurus). I'm not sure about the 'right' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for reject that I've seen before include "substandard article" , "Dismiss (as faulty)" , "Disallow; discard" , "Repulse or repudiate" , "Unacceptable object" .)

I've seen this clue in The Times.

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