Communication system annoying when characters cycled (5)
I believe the answer is:
skype
'system annoying when characters cycled' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'communication' is the wordplay.
I cannot really understand how this works, but
'communication' could be 'pe' (pe is a kind of communication) and 'pe' is found in the answer.
The remaining letters 'sky' is a valid word which might be clued in a way I don't see.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for skype that I've seen before include "Have a spoken conversation via the internet" , "Online phone service" , "Computer-based telephone software" , "program" , "Telephone over the internet" .)