Torment Scotsman about international match's conclusion (7)
I believe the answer is:
anguish
'torment' is the definition.
(I know that torment is a more specific form of anguish)
'scotsman about international match's conclusion' is the wordplay.
'scotsman' becomes 'angus' (I've seen this before).
'about' indicates putting letters inside.
'international' becomes 'i' (abbreviation eg in IMF).
'conclusion' indicates one should take the final letters.
The last letter of 'match' is 'h'.
'angus' going around 'i' is 'anguis'.
'anguis'+'h'='ANGUISH'
(Other definitions for anguish that I've seen before include "Agony, distress" , "extreme pain" , "Extreme misery" , "torture" , "Great sorrow" .)