Get over an affliction (5) -R-S-
Flat iron? (4) E--- (I can see the answer as even, but what has that got to do with iron?)
Strung up (8) -H-E-D-D (could it be threaded?)
1 Cross? double maening as in a cross to bear (an affliction
2 yes Even (when you iron cothes you even them out)
3 Threaded looks ok given your letters