Article kept in school: it's inside, alarmed (8)
I believe the answer is:
agitated
'alarmed' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?
'article kept in school it's inside' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'kept in school' becomes 'gated' (I've seen this before).
'inside' is an insertion indicator.
'gated' enclosing 'it' is 'gitated'.
'a'+'gitated'='AGITATED'
Can you help me to learn more?
(Other definitions for agitated that I've seen before include "Aroused - disturbed" , "caused a stir" , "Unsettled" , "Worked up, flustered" , "beat" .)