Scornful language and right after it, audible yawning (7)
I believe the answer is:
sarcasm
'scornful language' is the definition.
(I've seen this before)
'right after it audible yawning' is the wordplay.
I cannot really see how this works, but
'right' could be 'r' (common abbreviation) and 'r' is located in the answer.
'it' could be 'sa' (old-fashioned abbreviation for sex appeal) and 'sa' is present in the answer.
This explanation may well be incorrect...
'and' acts as a link.
Can you help me to learn more?
(Other definitions for sarcasm that I've seen before include "Ironically scornful language" , "Scornful jibe" , "Mocking irony" , "Insulting irony" , "The use of irony to mock" .)