Flimsy, tenuous (6)
I believe the answer is:
slight
This clue is a double definition.
'flimsy' is the first definition.
(I know that flimsy can be written as slight)
'tenuous' is the second definition.
(I know that tenuous can be written as slight)
(Other definitions for slight that I've seen before include "trivial" , "Aspersion" , "Deliberately discourteous act" , "Deliberate discourteous act" , "Insult, affront" .)