A liking for a feather bed maybe (4,4)
I believe the answer is:
soft spot
'a liking' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for soft spot that I've seen before include "Sentimental fondness" , "Sentimental affection" , "showing fondness" , "Emotional susceptibility" , "Affectionate weakness for (someone/something)" .)