Tease bishop in prison game (8)
I believe the answer is:
cribbage
'game' is the definition.
(cribbage is a card game)
'tease bishop in prison' is the wordplay.
'tease' becomes 'rib' (rib can mean to tease or mock).
'bishop' becomes 'B' (abbreviation for bishop in chess).
'in' indicates putting letters inside.
'prison' becomes 'cage' (cage is a kind of prison).
'rib'+'b'='ribb'
'ribb' going inside 'cage' is 'CRIBBAGE'.
(Other definitions for cribbage that I've seen before include "Card-game" , "SPORT/GAME" , "Card game for two to four players" , "activity for couple sitting at table" , "Card game scored with pegs" .)