The ornamental design for a learningdial for a clock, as shown and described.
FIG. 1 is a front view of the design for a learning dial for a clock (the
boundary of which is indicated in phantom line which forms no part of the
design), wherein each hour sector around the center is colored with a
contrasting color to the adjacent sectors (the article being two
dimensional and having no other views necessary to show the design).
The clock hands depicted by means of broken lines in FIG. 1 have been shown
for illustrative purposes only and form no part of the claimed design.