Run away from highway without leaving instructions (9)
I believe the answer is:
intestate
'without leaving instructions' is the definition.
I can't judge whether this defines the answer.
'run away from highway' is the wordplay.
'run' becomes 'r' (cricket abbreviation).
'away from' suggests deleting specific letters.
'highway' becomes 'interstate' (interstate is a highway between two US states).
'interstate' with 'r' removed is 'INTESTATE'.
Can you help me to learn more?
(Other definitions for intestate that I've seen before include "Passing on without leaving a will" , "Dying thus, one leaves no will" , "Dying thus, one has left no will" , "Unwilling" , "not prepared to leave" .)