A rich place of relaxation (5)
I believe the answer is:
chair
'relaxation' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'a rich place' is the wordplay.
'place' indicates anagramming the letters (I've seen 'placed' mean this (placing the letters)).
'a'+'rich'='arich'
'arich' with letters rearranged gives 'CHAIR'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for chair that I've seen before include "Movable seat" , "president" , "director at meeting" , "Get seat" , "Backed seat for one" .)