Incite about game on computer and parting drink (7,3)
I believe the answer is:
stirrup cup
'parting drink' is the definition.
(drink taken before riding off on horseback)
'incite about game on computer' is the wordplay.
'incite' becomes 'stirup' (synonyms).
'about' indicates putting letters inside.
'game on' becomes 'ru' (rugby union. I am not sure about the 'on' bit.).
'computer' becomes 'pc' (PC is an example).
'ru'+'pc'='rupc'
'stirup' enclosing 'rupc' is 'STIRRUP-CUP'.
'and' acts as a link.
(Other definitions for stirrup cup that I've seen before include "'One for the Ride'" , "last drink!" , "Drink offered to huntsman" , "Rider's setting-off drink" , "Leaving drink" .)