Pelmanism tests this area where people play everything (6)
I believe the answer is:
recall
'pelmanism tests this area' is the definition.
(Pelmanism is a type of memory or recall training)
'where people play everything' is the wordplay.
'where people play' becomes 'rec' (short for recreation ground).
'everything' becomes 'all' (I've seen this before).
'rec'+'all'='RECALL'
(Other definitions for recall that I've seen before include "Summon back or bring to mind" , "Recollect" , "Summon back - ability to remember" , "Summon back, perhaps to mind" , "Summon to return" .)