Frightened to open, was induced to (8)
I believe the answer is:
startled
'frightened' is the definition.
(I've seen this in another clue)
'open was induced to' is the wordplay.
I cannot quite understand how this works, but
'open' could be 'start' (I've seen this in another clue) and 'start' is found in the answer.
'induced' could be 'led' (leading is a kind of inducing) and 'led' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for startled that I've seen before include "Shocked, alarmed" , "Caused sudden alarm" , "Taken by surprise" , "Taken aback" , "Frightened or suprised suddenly" .)