What one may do to rocket in take-off (4-2)

I believe the answer is:

send-up

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'take-off' is the definition.
(I know that takeoff can be written as send-up)

I don't understand the remainder of the clue.

(Other definitions for send-up that I've seen before include "Spoof - jail" , "Parody" , "Mockery" .)

I've seen this clue in The Times.

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