If you uninstall everything related with the *, then those packages that depend from or are named like, will get removed.
BUT: What makes you actually think that installing without that * will actually pull everything related to osso-rss-feed-reader???

So instead of asking here, do a search in the package cache! May that be via FasterApplicationManager or X-Terminal and apt-cache.
Try Pick up the package called widget or applet or similiar and you are fine to install it.