Informal artist given gibe that's degrading (5,3)
I believe the answer is:
infra dig
'that's degrading' is the definition.
(I've seen this before)
'informal artist given gibe' is the wordplay.
'informal artist given' becomes 'infra' (I can't explain this - if you can you should believe this answer much more).
'gibe' becomes 'dig' (synonyms).
'infra'+'dig'='INFRA-DIG'
Can you help me to learn more?
(Other definitions for infra dig that I've seen before include "Rigid fan may be lacking in dignity" , "Such as one would not stoop to" , "Demeaning (Latin)" , "Beneath one" , "degrading" .)