Girl (4)
'girl' is the definition.
(lass can informally mean a girl)
This is the entire clue.
(Other definitions for lass that I've seen before include "Sweet resident of Richmond Hill?" , "Scottish girl" , "Damsel" , "Sweetheart" , "Miss" .)
'girl' is the definition.
(I know that maiden is a type of girl)
This is all the clue.
(Other definitions for maiden that I've seen before include "Dotty over" , "Earliest - unmarried" , "Miss" , "Girl; kind of over" , "Unmated; runless over" .)