Chic yet irritable (6)
I believe the answer is:
snappy
This clue is a double definition.
'chic' is the first definition.
(thesaurus)
'irritable' is the second definition.
(I know that irritable can be written as snappy)
'yet' acts as a link.
(Other definitions for snappy that I've seen before include "Irritable, curt; concise" , "make it fast, so" , "Irritable - quick - fashionable" , "Curt; neat, stylish" , "Quick(-tempered)" .)