Manuscript’s opening with two historic articles? Nonsense! (2,3)
I believe the answer is:
my eye
'nonsense' is the definition.
(I've seen this before)
'manuscript's opening with two historic articles?' is the wordplay.
I cannot quite see how this works, but
'opening' could be 'eye' (eye is a kind of opening) and 'eye' is located in the answer.
The remaining letters 'my' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for my eye that I've seen before include "I can see with this" , "Certainly not" , "the detective I hired?" , "That's nonsense!" , "All - - and Betty Martin" .)