Converts and fits (5)
I believe the answer is:
turns
This clue could be a double definition.
'converts' is the first definition.
('turn' can be a synonym of 'convert')
'fits' is the second definition.
The definition and answer can be both related to communication as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'and' is the link.
Can you help me to learn more?
(Other definitions for turns that I've seen before include "Bends" , "Goes off" , "Rotates" , "Moves in a new direction" , "Changes direction" .)