It's scandalous that god is elegant (11)
I believe the answer is:
disgraceful
'it's scandalous' is the definition.
('disgraceful' can be a synonym of 'scandalous')
'god is elegant' is the wordplay.
'god' becomes 'dis' (Dis is an example).
'is elegant' becomes 'graceful' ('graceful' is associated in meaning with 'elegant'**).
'dis'+'graceful'='DISGRACEFUL'
'that' acts as a link.
(Other definitions for disgraceful that I've seen before include "far from honourable" , "Abominable - scandalous" , "Shockingly unacceptable" , "Dishonourable" .)