Should Oscar write to this character, intending correspondence to be published? (4,6)
I believe the answer is:
open letter
'should oscar write to this character intending' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'correspondence to be published?' is the wordplay.
'correspondence' becomes 'letter' (I've seen this before).
'to' means one lot of letters go next to another (I've seen this in other clues).
'be published?' becomes 'open' (I can't explain this - if you can you should believe this answer much more).
'letter' put after 'open' is 'OPEN-LETTER'.
Can you help me to learn more?
(Other definitions for open letter that I've seen before include "Use knife, perhaps" , "public protest" , "widely-publicised protest" , "Written missive intended for general consumption" , "Communication intended for public reading" .)