Unconvincing copy (6)

I believe the answer is:

flimsy

I believe this is a double definition.

'unconvincing' is the first definition.
(thesaurus)

'copy' is the second definition.
(thesaurus)

(Other definitions for flimsy that I've seen before include "Insubstantial, light and thin" , "Lacking strength and solidity" , "Weak, insubstantial" , "Light and thin, fragile" , "Lightweight" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app