The restaurant's excellent service is not enough to 'redeem' [='compensate for'] the mediocre food.
The President 'redeemed' his campaign promise. [=he did what he promised to do]
The exciting ending partially 'redeems' what is otherwise a very dull movie.
(..) ...lest I be discarded. Your shield and armor? My father's, sir. I beg you, bold king, to permit me... ...to redeem my father's name by serving you in combat. My father trained me to feel no fear, to make spear and shield and sword... ...as much a part of me as my own beating heart. (..)2006 300