Genuine or spontaneous (7)
I believe the answer is:
natural
This clue is a double definition.
'genuine' is the first definition.
(thesaurus)
'spontaneous' is the second definition.
(synonyms)
(Other definitions for natural that I've seen before include "Frank < , twenty-one" , "one short of being sharp?" , "Organic" , "Illegitimate" , "Normal; off-white" .)