Amelia B might be approachable (7)
I believe the answer is:
amiable
'approachable' is the definition.
(thesaurus)
'amelia b might be' is the wordplay.
'might be' is an anagram indicator.
'amelia'+'b'='ameliab'
'ameliab' with letters rearranged gives 'AMIABLE'.
(Other definitions for amiable that I've seen before include "Friendly and good-natured (7)" , "'Cordial, friendly (7)'" , "'Friendly, pleasant and good-tempered (7)'" , "Of sweet and friendly disposition" , "Charming" .)