In Open drive off — hit too far? (9)
I believe the answer is:
overshoot
'hit too far?' is the definition.
I can't judge whether this defines the answer.
'in open drive off' is the wordplay.
'in' is an insertion indicator.
'open' becomes 'overt' (associated in meaning).
'drive off' becomes 'shoo' (shoo can mean to drive off or send away).
'overt' going around 'shoo' is 'OVERSHOOT'.
Can you help me to learn more?
(Other definitions for overshoot that I've seen before include "Go beyond the intended target" , "Taxi too much, perhaps" , "Go extra distance" , "Go too far" , "Maybe miss the green" .)