Offensive to keep relative in view (7)
I believe the answer is:
visible
'in view' is the definition.
(similar in meaning)
'offensive to keep relative' is the wordplay.
'offensive' becomes 'vile' (vile can mean offensive or disgusting).
'to keep' is an insertion indicator.
'relative' becomes 'sib' (sib is short for sibling).
'vile' placed around 'sib' is 'VISIBLE'.
(Other definitions for visible that I've seen before include "Showing up" , "Obvious to the eye" , "Perceptible by the eye" , "Apparent" , "Able to be seen" .)