Switzerland to disseminate seat (5)
I believe the answer is:
chair
'seat' is the definition.
(I know that chair is a type of seat)
'switzerland to disseminate' is the wordplay.
'switzerland' becomes 'ch' (short for Confoederatio Helvetica, its Latin name).
'to disseminate' becomes 'air' (I can't justify this - if you can you should give a lot more credence to this answer).
'ch'+'air'='CHAIR'
Can you help me to learn more?
(Other definitions for chair that I've seen before include "Something with legs" , "Lead" , "A committee's most important seat" , "Movable seat" , "Seat for one person" .)