Proceed hurriedly to emergency take-off (8)
I believe the answer is:
scramble
'emergency take-off' is the definition.
(I've seen this before)
'proceed hurriedly' is the wordplay.
I cannot really see how this works, but
'proceed' could be 'ramble' (rambling is a kind of proceeding) and 'ramble' is located in the answer.
This explanation may well be incorrect...
'to' acts as a link.
Can you help me to learn more?
(Other definitions for scramble that I've seen before include "keep communication secret" , "Disordered mixture" , "Stir eggs vigorously" , "Jockey for position" , "Clambers (anag) - clamber" .)