1852 Będzin, Poland
Clara seems to have had a variety of names:
And her surname is also given as Syszman, Süßman, ...
The dates for Moritz and Clara vary by a few years in these sources but they are all "embedded" within the same family relationships, so I am fairly sure, that the sources all refer to the same person.
(see also: Margulies & Sussman ! - but not ours !! )
 Dr. Emil Margulies, Ein Lebenskampf für Wahrheit und Recht, Faerber, 1949, Tel Aviv
Father: Izrael SUSSMANN
Mother: Sara Gitel HAMBURGER
1932, 25 February, Vienna, Austria
... ist wenige Tag vor Vollendung ihres achtzigsten Lebensjahre sanft entschlafen.
... passed gently away shortly before her eightieth birthday.
A Garden for Clara Margulies. To honour the memory of their mother Clara Margulies (died 25th. February 1932) her children, Anna Putermann, Dr. Isidor Margulies, Dr. Emil Margulies (Leitmeritz), Hans Margulies, Heinrich Margulies (Tel Aviv), have endowed a garden in the "Clara Margulies Grove". The deposit of 500 Austrian Schillings has been transferred to the Keren Kajemeth. Die Stimme, Volume 5, No. 218, 10th. March 1932
A Garden for Clara Margulies. With the 500 Schillings that were received this week, the first garden in the "Clara Margulies Grove" was able to be completed. Die Stimme, Volume 5, No. 228, 19th. May 1932
See also Moritz Margulies and Clara Sussman