Affectionate feeling needs stern correction! (10)
I believe the answer is:
tenderness
'affectionate feeling' is the definition.
'tenderness' can be an answer for 'feeling' (tenderness is a kind of feeling). I am not sure about the 'affectionate' bit.
'needs stern correction' is the wordplay.
'correction' is an anagram indicator (I've seen this in other clues).
'needs'+'stern'='needsstern'
'needsstern' anagrammed gives 'TENDERNESS'.
Can you help me to learn more?
(Other definitions for tenderness that I've seen before include "sore?" , "Gentleness, sensitivity" , "Compassion" , "Heart" , "Gentle quality" .)