Flimsy (5)
'flimsy' is the definition.
(I know that flimsy can be written as tenuous)
This is the entire clue.
(Other definitions for tenuous that I've seen before include "Very slight, insubstantial" , "Flimsy, thin" , "Very slight, with little substance or validity" , "Very thin in form, having little validity" , "Sketchy" .)
'flimsy' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for frail that I've seen before include "Old woman" , "Puny" , "Struggling to get about" , "American woman" , "Delicate, fragile" .)