Jump when surprised in launch? (5)
I believe the answer is:
start
This might be a double definition.
'jump' is the first definition.
(as in starting or jumping in fear)
'surprised in launch?' is the second definition.
'start' can be an answer for 'launch?' (I've seen this before). I'm unsure of the 'surprised in' bit.
'when' acts as a link.
Can you help me to learn more?
(Other definitions for start that I've seen before include "lead" , "Jerk" , "Begin with sudden movement of surprise" , "Begin to recoil?" , "Outset" .)