Hardened to everything in the company going to America (7)
I believe the answer is:
callous
'hardened' is the definition.
(synonyms)
'everything in the company going to america' is the wordplay.
'everything' becomes 'all' (all things).
'in the' is an insertion indicator.
'company' becomes 'co' (abbreviation).
'going to' is a charade indicator (letters next to each other).
'america' becomes 'US' (United States).
'all' put into 'co' is 'callo'.
'callo'+'us'='CALLOUS'
'to' acts as a link.
(Other definitions for callous that I've seen before include "Hard and unfeeling" , "Cruel or unsympathetic" , "Hard-hearted" , "Insensitive, cruel" , "Cruel and unfeeling" .)