Skin-deep (11)
'skin-deep' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for superficial that I've seen before include "Not profound" , "Far from thorough" , "12 [TWO DIMENSIONAL]" , "Cursory" .)
'skin-deep' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for shallow that I've seen before include "Insincere" , "Superficial" , "Having little depth" , "justice" , "Of no great depth" .)