Old flyers going round in game (4)
I believe the answer is:
faro
'game' is the definition.
(I know that Faro is a type of card game)
'old flyers going round' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'flyers' becomes 'RAF' (Royal Air Force).
'going round' is a reversal indicator.
'o'+'raf'='oraf'
'oraf' written backwards gives 'FARO'.
'in' is the link.
(Other definitions for faro that I've seen before include "City in Portugal's Algarve" , "Atlantic port" , "Portuguese seaport" , "Algarve seaport" , "Gambling game with card dealer and players" .)