I was under the impression that the Kidderminster Clares were to the
great early Clares, as the Spencers (e.g. Diana) were to the Despensers
(that is, not related at all but somehow admitted as sort-of-successors
by the Tudor heralds). But I'm happy to be proved wrong.
Nat Taylor
a genealogist's sketchbook:
http://www.nltaylor.net/sketchbook/