Something repellent in paintings — blood (7)
I believe the answer is:
oilskin
'something repellent' is the definition.
I can't tell whether this definition defines the answer.
'paintings blood' is the wordplay.
'paintings' becomes 'oils' (oil paintings).
'blood' becomes 'kin' (both can mean one's family).
'oils'+'kin'='OILSKIN'
'in' is the link.
Can you help me to learn more?
(Other definitions for oilskin that I've seen before include "material" , "Waterproof cloth as for sailors" , "protective cloth" , "Heavy waterproofed cloth" , "Raincoat" .)