Insult name of Granuaile - that's a scandal (8)
I believe the answer is:
disgrace
'that's a scandal' is the definition.
(I've seen this before)
'insult name' is the wordplay.
'insult' becomes 'dis' (I've seen this in another clue).
'name' becomes 'grace' ().
'dis'+'grace'='DISGRACE'
'of granuaile' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for disgrace that I've seen before include "Dishonour, ignominy" , "Bring shame upon" , "Cadger is in state of ignominy" , "Loss of honour" , "Loss of reputation as the result of dishonourable action" .)