Nod off relatives of some table linen (6)
I believe the answer is:
napkin
'some table linen' is the definition.
(napkin is a kind of table linen)
'nod off relatives' is the wordplay.
'nod off' becomes 'nap' (I've seen this in another clue).
'relatives' becomes 'kin' (I've seen this in another clue).
'nap'+'kin'='NAPKIN'
'of' acts as a link.
(Other definitions for napkin that I've seen before include "Protective cloth square worn at meal" , "Small piece of table linen" , "Cloth square used to protect clothing while eating" , "Protective cloth square donned during meals" , "Cloth rectangle worn at mealtime" .)