Incoherent and lacking class? (8)
I believe the answer is:
formless
'incoherent' is the definition.
(thesaurus)
'lacking class?' is the wordplay.
I cannot really see how this works, but
'lacking' could be 'less' (I've seen this in another clue) and 'less' is found within the answer.
'class?' could be 'form' ('form' can be a synonym of 'class') and 'form' is found within the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' is the link.
Can you help me to learn more?
(Other definitions for formless that I've seen before include "Without shape" , "Lacking shape" , "Blobby" .)