@alchemylee,
66a To minister to some0ne is to serve them, you also serve a prison sentence.
72a The word 'love' in a cryptic clue usually means O - in tennis the score zero = love. So the answer is an anagram of O and BIG.
50d 'New leader' means you have to change the first letter of the word - REVERE = look up to.
I hope this helps.