Exaggerated consequence of chewing that eclair (10)
I believe the answer is:
theatrical
'exaggerated' is the definition.
(thesaurus)
'chewing that eclair' is the wordplay.
'chewing' indicates anagramming the letters.
'that'+'eclair'='thateclair'
'thateclair' anagrammed gives 'THEATRICAL'.
'consequence of' acts as a link.
(Other definitions for theatrical that I've seen before include "Excessively dramatic" , "Showbiz" , "Artificial and exaggerated" , "Stagy" , "affected" .)