Hear a girl cry (4)
I believe the answer is:
'cry' is the definition.
(I have seen 'Cry of grief' mean 'alas' so perhaps 'cry' could also mean 'alas')
'hear a girl' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
The remaining letters 'las' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for alas that I've seen before include "Interjection of sorrow" , "woebegone expression" , "Expression of grief or misfortune" , "Sad to say!" , "Too bad, so sad" .)