### Clue: I'm sorry to be taken aback by retraction of girl's word of praise (7)
### Answer: HOSANNA 
 ### Explanation: Definition: word of praise
 **Reversal of**(… to be taken aback) OH!(like "I'm sorry", an apology for having made a mistake) **plus**(by) **reversal of**(retraction of) ANNA(a girl's name)'S .
Defn: … in Christianity.