Is it a role-playing game? (9)
I believe the answer is:
solitaire
'game?' is the definition.
(solitaire is a kind of game)
'is it a role-playing' is the wordplay.
'playing' indicates an anagram.
'is'+'it'+'a'+'role'='isitarole'
'isitarole' is an anagram of 'SOLITAIRE'.
(Other definitions for solitaire that I've seen before include "Gem set by itself" , "Game for one person - single gem" , "Board game played by one person" , "game > bird" , "Bond girl" .)