Country that may be hard on us (8)
I believe the answer is:
honduras
'country' is the definition.
(I know that Honduras is a Central American country)
'may be hard on us' is the wordplay.
'may be' is an anagram indicator.
'hard'+'on'+'us'='hardonus'
'hardonus' anagrammed gives 'HONDURAS'.
'that' is the link.
(Other definitions for honduras that I've seen before include "Central American country, capital Tegucigalpa" , "US hadron in Central America, strangely" , "Central American state" , "Central Amer. country" , "Country of Central America" .)