A shrill cry from Mary Ellis (4)

I believe the answer is:

yell

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'a shrill cry' is the definition.
'yell' can be an answer for 'cry' (synonyms). I am not certain of the 'a shrill' bit.

'from mary ellis' is the wordplay.
'from' indicates a hidden word.
'YELL' is hidden in the letters of 'mary ellis'.

Can you help me to learn more?

(Other definitions for yell that I've seen before include "Clement --, politician" , "roar" , "Shetland isle" , "Loud utterance" , "Scream" .)

I've seen this clue in the Evening Standard.

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