A good laugh? Pious role model is taken aback (6)
I believe the answer is:
aghast
'is taken aback' is the definition.
(I've seen this in another clue)
'a good laugh? pious role model' is the wordplay.
'good' becomes 'g' (abbreviation).
'laugh?' becomes 'ha'.
'pious role model' becomes 'st' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'g'+'ha'+'st'='AGHAST'
Can you help me to learn more?
(Other definitions for aghast that I've seen before include "What's carried in bag has teacher" , "Filled with terror" , "Filled with consternation or horror" , "in awe" , "Deeply shocked" .)