Affection (10)
There are a few possibilities for this:
'affection' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for endearment that I've seen before include "Word of affection" , "Fondness" , "Affectionate term" , "Expression of love" , "Affectionate word" .)
'affection' is the definition.
(I know that affection can be written as tenderness)
This is all the clue.
(Other definitions for tenderness that I've seen before include "Gentle quality" , "sore?" , "Heart" , "Compassion" , "Gentleness, sensitivity" .)
'affection' is the definition.
(I know that attachment is a type of affection)
This is the entire clue.
(Other definitions for attachment that I've seen before include "Affinity" , "Fondness" , "what often comes with spam?" , "Affection" , "communicated via e-mail" .)
'affection' is the definition.
(I know that affection can be written as fondness)
This is all the clue.
(Other definitions for fondness that I've seen before include "Affection" , "Liking (for something)" .)