Clue: Noisy protest extremely unchristian — head dished out a hundred lines (3,3,3)
Answer: HUE AND CRY
Explanation: Definition: Noisy protest
Anagram of U[nchristia]N + HEAD, + C (100) + RY (railway = Iines) (I've just noticed that the letters of both UN and HEAD are in order in the "anagram", so perhaps that bit needs to be interpreted slightly differently)