Article following period at high school initially brings sets of consequences (10)
I believe the answer is:
aftermaths
'consequences' is the definition.
('aftermath' can be a synonym of 'consequence')
'article following period at high school' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'following' becomes 'f' (used when citing page numbers etc).
'period' becomes 'term' (term is a kind of period).
'high school' becomes 'hs'.
'a'+'f'+'term'+'at'+'hs'='AFTERMATHS'
'initially brings sets of' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for aftermaths that I've seen before include "Consequences" , "Wakes" .)