He or she opens non-parlour games (8,7)
I believe the answer is:
personal pronoun
'he or she' is the definition.
(I've seen this in another clue)
'opens non-parlour games' is the wordplay.
'games' indicates an anagram (I've seen 'game' mean this (solving anagrams is a game)).
'opens'+'non'+'parlour'='opensnonparlour'
'opensnonparlour' is an anagram of 'PERSONAL PRONOUN'.
(Other definitions for personal pronoun that I've seen before include "Maybe we" , "us, perhaps" , "We, say" .)