Arching awkwardly in embarrassment (7)
I believe the answer is:
chagrin
'embarrassment' is the definition.
(chagrin is a kind of embarrassment)
'arching awkwardly' is the wordplay.
'awkwardly' indicates anagramming the letters.
'arching' with letters rearranged gives 'CHAGRIN'.
'in' acts as a link.
(Other definitions for chagrin that I've seen before include "Annoyance/shame at one's failure" , "Shame at having failed" , "Feeling of annoyance and disappointment" , "Strong feeling of embarrassment" , "anything but delight" .)