A hundred cheers perhaps or one cry of terror (7)

I believe the answer is:

screech

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'one cry of terror' is the definition.
I can't judge whether this defines the answer.

'a hundred cheers perhaps' is the wordplay.
'a hundred' becomes 'C' (Roman numeral).
'perhaps' is an anagram indicator.
'c'+'cheers'='ccheers'
'ccheers' is an anagram of 'SCREECH'.

'or' is the link.

Can you help me to learn more?

(Other definitions for screech that I've seen before include "Outcry" , "Harsh piercing cry" , "Loud harsh cry" , "Raucous sound" , "Squawk" .)

I've seen this clue in The Globe and Mail and The Irish Independent.

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