Girl taking tin round America (5)
I believe the answer is:
susan
'girl' is the definition.
'tin round america' is the wordplay.
'tin' becomes 'Sn' (Sn is the chemical symbol for tin).
'round' indicates putting letters inside.
'america' becomes 'usa' (synonyms).
'sn' placed around 'usa' is 'SUSAN'.
'taking' acts as a link.
(Other definitions for susan that I've seen before include "woman" , "- - Sarandon, film actress" , "sometimes lazy, passing round the condiments" , "with blooming black eye?" , "She's a black-eyed flower" .)