Contact that hurts juvenile (6)
I believe the answer is:
callow
'juvenile' is the definition.
(thesaurus)
'contact that hurts' is the wordplay.
'contact' becomes 'call'.
'that hurts' becomes 'ow'.
'call'+'ow'='CALLOW'
(Other definitions for callow that I've seen before include "Inexperienced or innocent" , "23 [BRIGHTONIAN] actor" , "lacking experience of life" , "Young and inexperienced" , "Jejune" .)