Cry of equine creature heard (4)

I believe the answer is:

mewl

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'cry of equine' is the definition.
'mewl' can be an answer for 'cry' (I've seen this in another clue). I'm not sure about the 'of equine' bit.

'creature heard' is the wordplay.
'creature' becomes 'mule' (offspring of a donkey and a horse).
'heard' shows a homophone (sound like).
'mule' is a homophone of 'MEWL'.

Can you help me to learn more?

(Other definitions for mewl that I've seen before include "Whimper (like a baby?)" , "Make a whimpering noise" , "Cry feebly" , "weakly cry" , "Animal noise" .)

I've seen this clue in The Times.

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