Crossword Genius

The girl alas in retreat releasing the odd cry (5)

Ross

I believe the answer is:

aargh

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'cry' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

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(Other definitions for aargh that I've seen before include "Exclamation of frustration or rage" , "Yell of dismay" , "that's dreadful!" , "Expression of dismay" , "I'm so exasperated!" .)

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