A fair's arranged for the pleasure of certain travellers (6)
I believe the answer is:
safari
'pleasure of certain travellers' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'a fair's arranged' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'a'+'fairs'='afairs'
'afairs' with letters rearranged gives 'SAFARI'.
'for the' is the link.
Can you help me to learn more?
(Other definitions for safari that I've seen before include "Wildlife-watching expedition" , "As fair as an African expedition" , "North African capital" , "African hunting expedition" , "Expedition to observe animals" .)