It hurts to wear jewellery in this game (7)
I believe the answer is:
bowling
'this game' is the definition.
(bowling is a kind of game)
'it hurts to wear jewellery' is the wordplay.
'it hurts' becomes 'ow' (exclamation of pain).
'to wear' is an insertion indicator (to wear something is to be covered up by it).
'jewellery' becomes 'bling' (I've seen this before).
'ow' placed within 'bling' is 'BOWLING'.
'in' is the link.
(Other definitions for bowling that I've seen before include "Game" , "-- Alley; -- green" , "making a delivery" , "Sport" , "getting out" .)