Crossword Genius

Something added is a letter dictated (6)

Ross

I believe the answer is:

annexe

I'm a little stuck... Click here to teach me more about this clue!

'something added' is the definition.
I can't judge whether this defines the answer.

'a letter dictated' is the wordplay.
'a' becomes 'an'.
'letter' becomes 'n'.
'dictated' becomes 'exe' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'an'+'n'+'exe'='ANNEXE'

'is' is the link.

Can you help me to learn more?

(Other definitions for annexe that I've seen before include "Joined-on building" , "An addition to a document or building" , "Extra accommodation block" , "bit on the side?" , "Extension, supplement" .)

I've seen this clue in The Independent, The Times and The Telegraph.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.