Childhood (5)
'childhood' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for infancy that I've seen before include "beginning" , "youth" , "State of early childhood" , "minority" , "Early stages of" .)
'childhood' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for youth that I've seen before include "Youngster" , "Early days" , "Young people" , "Youngsters" , "Lad" .)