Abandon plane originally taken by one boy (8)

I believe the answer is:

jettison

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'abandon' is the definition.
(I've seen this before)

'plane originally taken by one boy' is the wordplay.
'plane' becomes 'jet plane' (jet plane).
'originally taken by one' becomes 'ti' (I can't justify this - if you can you should believe this answer much more).
'boy' becomes 'son' (synonyms).
'jet'+'ti'+'son'='JETTISON'

Can you help me to learn more?

(Other definitions for jettison that I've seen before include "scrap" , "Chuck overboard" , "Ditch (cargo)" , "Remove" , "21 [OFFLOAD]" .)

I've seen this clue in The Daily Express.

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