One on the tail of pair planning lurid hijacking (3,6)

I believe the answer is:

air piracy

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'hijacking' is the definition.

'one on the tail of pair planning lurid' is the wordplay.
'one' becomes 'a'.
'on' is an insertion indicator (as in clothing \'on\' a person).
'the tail of' says to take the final letters.
'planning' becomes 'ipi' (I can't justify this - if you can you should believe this answer much more).
'lurid' becomes 'racy'.
The last letter of 'pair' is 'r'.
'r' inserted inside 'ipi' is 'irpi'.
'a'+'irpi'+'racy'='AIR PIRACY'

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I've seen this clue in The Guardian.

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