Squeal angrily, missing school match (5)
I believe the answer is:
equal
'match' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for equal that I've seen before include "Identical, add up to" , "On a par" , "Peer; evenly balanced" , "Level" , "Uniform" .)