Game to set kilts swirling? (8)
I believe the answer is:
skittles
'game' is the definition.
(skittles is a kind of game)
'set kilts swirling?' is the wordplay.
'swirling?' indicates anagramming the letters (letters get swirled around).
'set'+'kilts'='setkilts'
'setkilts' anagrammed gives 'SKITTLES'.
'to' acts as a link.
(Other definitions for skittles that I've seen before include "Game in which ball is aimed at pins" , "Ninepins" , "bowling pursuit" , "Bowling game" , "Pub game" .)