Lemon Sky (Keen Company, Clurman Theatre, 410 W. 42, closes Oct. 22). Lanford Wilson’s 1970 coming-of-age play, like the rest of his prolific output, has faded from view in recent years, but Keen Company’s letter-perfect off-Broadway revival makes a powerfully compelling case for this Glass Menagerie-derived tale of a sensitive teenage boy whose long-delayed reunion with his divorced father proves to be wrenchingly disrupting. How good was Wilson? Judging by this superlative production, it’s time for a full-scale reconsideration of his work (TT).