When a car crashes, it's bent (3)
I believe the answer is:
arc
'bent' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'when a car crashes' is the wordplay.
'car' can be anagrammed to 'ARC'.
Though, I am not sure how the anagram is indicated.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for arc that I've seen before include "Light" , "Luminous electrical discharge" , "Bend" , "bends?" , "section of Circle Line" .)