From girl, a cry of surprise (3)

I believe the answer is:

amy

'from girl' is the definition.
I can't judge whether this definition defines the answer.

'a cry of surprise' is the wordplay.
'cry of surprise' becomes 'my' (expression of surprise).
'a'+'my'='AMY'

(Other definitions for amy that I've seen before include "-- Johnson, female flyer" , "so-called little woman" , "- Johnson, Eng. aviator" , "Youngest of Little Women" , "- Johnson, Eng. aviatrix" .)

I've seen this clue in The Guardian.

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