It's relatively helpful (8)
I believe the answer is:
nepotism
'it's relatively helpful' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nepotism that I've seen before include "Undue partiality" , "Taking on family" , "example of relative favouritism" , "Favouritism shown in hiring relatives" , "Favouritism shown to friends and family" .)