Turn on extremely neglected fairground ride (6)

I believe the answer is:
arouse
This might be a double definition.
'turn on' is the first definition.
(synonyms)
'extremely neglected fairground ride' is the second definition.
The definition and answer can be both to do with communicating as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
Can you help me to learn more?
(Other definitions for arouse that I've seen before include "Turn on" , "excitement" , "Incite or stimulate" , "Awake from sleep" , "Cause to become awake" .)
