Wicket secured by delivery, last from Warne in game (9)
I believe the answer is:
bagatelle
'game' is the definition.
(bagatelle is a kind of game)
'wicket secured by delivery last from warne' is the wordplay.
'wicket' becomes 'gate'.
'secured by' indicates putting letters inside (I've seen this in other clues).
'delivery' becomes 'ball' (ball is a kind of delivery).
'last from' indicates one should take the final letters.
The last letter of 'warne' is 'e'.
'gate' inserted inside 'ball' is 'bagatell'.
'bagatell'+'e'='BAGATELLE'
'in' acts as a link.
(Other definitions for bagatelle that I've seen before include "Board game - trifle" , "musical composition" , "Board-game, trifle" , "Unimportant thing" , "game at the tables?" .)