Country after one new mine causes resentment (11)
I believe the answer is:
indignation
'resentment' is the definition.
(I've seen this before)
'country after one new mine' is the wordplay.
I cannot really see how this works, but
'country' could be 'nation' (synonyms) and 'nation' is located in the answer.
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'new' could be 'n' (common abbreviation eg NT for New Testament) and 'n' is located in the answer.
'mine' could be 'dig' (I've seen this before) and 'dig' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'causes' acts as a link.
Can you help me to learn more?
(Other definitions for indignation that I've seen before include "righteous anger" , "Resentment" , "Outrage, dudgeon" , "Annoyance at getting 12 down" .)