Affection, friendliness (6)
I believe the answer is:
warmth
This clue is a double definition.
'affection' is the first definition.
(I've seen this in another clue)
'friendliness' is the second definition.
(I've seen this before)
(Other definitions for warmth that I've seen before include "Moderate degree of heat" , "Enthusiasm, affection" , "Mild heat" , "Possibly fire" , "Feeling" .)