Woman in America opening tin (5)
I believe the answer is:
susan
'woman' is the definition.
'america opening tin' is the wordplay.
'america' becomes 'usa' (United States of America).
'opening' indicates putting letters inside (some letters open a gap in others).
'tin' becomes 'Sn' (Sn is the chemical symbol for tin).
'usa' going within 'sn' is 'SUSAN'.
'in' is the link.
(Other definitions for susan that I've seen before include "When lazy, she's a revolving tray on a dining table" , "Girl's name; lazy -" , "female" , "Girl's name, meaning lily" , "with blooming black eye?" .)