Is it supposed to be a literal bull's eye, as in the animals eye, or just a target bull's eye?

Thanks in advance.

The target. Although I've only ever seen it used to mean "like/ish" -ish would probably be a better keyword looking back on it.

yeah, mezbup's right. Although one meaning is target, its main purpose is turn a noun into an adjective. So, in addition to "-like" or "-ish," "-al" would also be a good way to think of it (music --->musical, history--->historical, etc)

But that doesn't provide the visual "hook" that the bull's eye does.

This character is the Chinese version of the particle "の", if that helps (it did for me). It's "keyword" meaning in my SRS:

普通話: OF; CLEAR, ACCURATE
日本語: TARGET; ADJECTIVAL SUFFIX

Yeah, that keyword screwed me up for quite a while.