This is the 12907th most frequent Russian word.
ленинце
The word "ленинце" does not appear to be accurate in isolation; perhaps you mean "ленинец," which translates to "Leninite" — a follower or supporter of Lenin's ideology.
Here, 'Lенинце' is used as the name of a location, likely a small town or settlement named after Lenin.
Он вырос в городе Ленинце.
He grew up in the town of Lenintse.
In this sentence, 'лeнина' may refer to Lenin himself (as a proper noun in a genitive case), with the play title contextualized as describing or related to Lenin as a character.
В школьной пьесе он сыграл роль ленина литьца.
In the school play, he played the role of Lenin himself.
Here, 'леннцев' is a plural possessive form which could describe inhabitants of a place called 'Lenintse,' indicating a group or subset organization.