Contact America? You'll want thick skin! (6)

I believe the answer is:

callus

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'thick skin' is the definition.
(thesaurus)

'contact america?' is the wordplay.
'contact' becomes 'call'.
'america?' becomes 'U.S.' (United States).
'call'+'us'='CALLUS'

'you'll want' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.

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(Other definitions for callus that I've seen before include "Area of hard skin" , "This thick-skinned" , "Skin problem" , "Thickened skin patch" , "A sore point" .)

I've seen this clue in The Sun.

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