Some American girl (5)
I believe the answer is:
erica
'girl' is the definition.
'some american' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'ERICA' is hidden in the letters of 'american'.
(Other definitions for erica that I've seen before include "ling" , "Woman" , "growing up on the moors" , "Heather's Latin name?" , "Shrubs" .)