Speedy removal from jet I once destroyed (8)
I believe the answer is:
ejection
'speedy removal' is the definition.
'ejection' can be an answer for 'removal' (I have seen 'Forcible removal ' mean 'ejection' so perhaps 'removal' could also mean 'ejection'). I am unsure of the 'speedy' bit.
'jet i once destroyed' is the wordplay.
'destroyed' is an anagram indicator.
'jet'+'i'+'once'='jetionce'
'jetionce' with letters rearranged gives 'EJECTION'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for ejection that I've seen before include "Throwing out - exile" , "Forcible throwing out" , "Pilot's escape from plane" , "Ousting" , "The business of putting out, as for non-payment of rent" .)