Mistake about mostly doubtful hour's suspense at end of programme (11)
I believe the answer is:
cliffhanger
This clue might be a double definition.
'mistake about mostly doubtful hour's suspense' is the first definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'end of programme' is the second definition.
'cliffhanger' can be an answer for 'programme' (cliffhanger is a kind of programme). I also know that 'end' relates to this answer.
'at' is the link.
Can you help me to learn more?
(Other definitions for cliffhanger that I've seen before include "Contest with the outcome in doubt right to the end" , "Tense, suspenseful situation" , "Dramatic ending" , "Thrilling end to episode" , "it keeps everyone in suspense" .)