Game in which father turns up to interrupt poor golfer (8)
I believe the answer is:
leapfrog
'game' is the definition.
(I know that leapfrog is a type of child\\u0027s game)
'father turns up to interrupt poor golfer' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'turns up' shows that the letters should be reversed in order.
'to interrupt' indicates putting letters inside.
'poor' indicates an anagram.
'pa' back-to-front is 'ap'.
'golfer' is an anagram of 'lefrog'.
'ap' going within 'lefrog' is 'LEAPFROG'.
'in which' is the link.
(Other definitions for leapfrog that I've seen before include "Playground game" , "Child's game of jumping over competitors" , "Child's game of jumping over other children" , "Game in which one child jumps over another" , "Children's game in which one jumps over the other alternately" .)