Lazybones fencing yard in daring jumper (8)
I believe the answer is:
skydiver
'daring jumper' is the definition.
'lazybones fencing yard' is the wordplay.
'lazybones' becomes 'skiver'.
'fencing' means one lot of letters goes inside another (to fence can mean to contain or put a limit round).
'yard' becomes 'yd'.
'skiver' placed around 'yd' is 'SKYDIVER'.
'in' is the link.
(Other definitions for skydiver that I've seen before include "I jump out of planes" , "Sporting parachutist" , "Aerial jumper" , "Person who performs acrobatics in upper air before opening parachute" , "High jumper?" .)