Tender feeling from a foe in fact is odd (9)
I believe the answer is:
affection
'tender feeling' is the definition.
(thesaurus)
'a foe in fact is odd' is the wordplay.
'is odd' indicates an anagram.
'foe'+'in'+'fact'='foeinfact'
'foeinfact' is an anagram of 'AFFECTION'.
'from' acts as a link.
(Other definitions for affection that I've seen before include "Fondness, tenderness" , "Fond attachment" , "Fondness or liking" , "Goodwill" , "Warm regard" .)