One million and two hurt (6)
I believe the answer is:
impair
'hurt' is the definition.
(thesaurus)
'one million and two' is the wordplay.
'one million' becomes 'im' (I've seen this in other clues).
'and' means one lot of letters go next to another.
'two' becomes 'pair' (pair is a kind of two).
'im'+'pair'='IMPAIR'
(Other definitions for impair that I've seen before include "Spoil strength, quality of" , "Hobble" , "'Mar, spoil (6)'" , "Reduce" , "Cause weakening of, damage" .)