Unpleasant character cutting parking in school leading to horrible cry (7)
I believe the answer is:
screech
This clue could be a double definition.
'unpleasant character cutting parking in school leading to horrible' is the first definition.
I know that 'unpleasant' relates to this answer.
'cry' is the second definition.
(screech is a kind of cry)
Can you help me to learn more?
(Other definitions for screech that I've seen before include "cry of horror" , "Loud harsh cry" , "Loud shrill cry" , "Squawk" , "High pitched shout" .)