That woman sounded doubly pretentious (6)
I believe the answer is:
chichi
'pretentious' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for chichi that I've seen before include "3[AFFECTATION]?" , "Very chic, repetitively" , "Extremely chic or sophisticated, from French" , "Affectedly trendy" , "Very chic and smart - twice?" .)