Work practice that's relatively favourable (8)
I believe the answer is:
nepotism
This clue could be a double definition.
'work practice' is the first definition.
(practice of giving work to one's relatives)
'relatively favourable' is the second definition.
I know that 'relatively' relates to this answer.
'that's' is the link.
Can you help me to learn more?
(Other definitions for nepotism that I've seen before include "Favouring family over others" , "Undue partiality" , "Jobs for the boys" , "Pro-family bias" , "Favouritism shown to relatives by those in power" .)