Confusion from time in school reportedly, one is livid at the start (7)
I believe the answer is:
turmoil
'confusion' is the definition.
(I've seen this before)
'time in school reportedly one is livid at the start' is the wordplay.
'time in school' becomes 'term' (as in school terms).
'reportedly' indicates a 'sounds like' (homophone) clue.
'at the start' indicates taking the first letters.
The initial letters of 'one is livid' is 'oil'.
'term' is a homophone of 'turm'.
'turm'+'oil'='TURMOIL'
'from' acts as a link.
(Other definitions for turmoil that I've seen before include "Pandemonium" , "Wild disorder" , "Agitation, confusion" , "Chaos" , "Uproar" .)