Crossword Genius

Girl is a wow (3)

Ross

I believe the answer is:

amy

'girl' is the definition.

'a wow' is the wordplay.
'wow' becomes 'my' (both can be expressions of surprise).
'a'+'my'='AMY'

'is' acts as a link.

(Other definitions for amy that I've seen before include "- Johnson, Eng. aviatrix" , "Record-making British aviator, Johnson" , "--, Johnson, solo flyer" , "-- Johnson, female flyer" , "Youngest of Little Women" .)

I've seen this clue in The Times.
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