Linen on table, blood on surface of fabric (6)
I believe the answer is:
napkin
'linen on table' is the definition.
'napkin' can be an answer for 'linen' (napkin is a kind of linen). I am unsure of the 'on table' bit.
'blood on surface of fabric' is the wordplay.
'blood' becomes 'kin' (I've seen this before).
'on' means one lot of letters go next to another.
'surface of fabric' becomes 'nap' (I am not sure about this - if you are sure you should believe this answer much more).
'kin' put after 'nap' is 'NAPKIN'.
Can you help me to learn more?
(Other definitions for napkin that I've seen before include "Cloth square used to protect clothing while eating" , "Protective cloth square donned during meals" , "Cloth rectangle worn at mealtime" , "Cloth square worn while eating" , "piece of material giving consumer protection" .)