In my chat I see clan TAG fir first, before the prefix. I need to do after the prefix, how to do it?
I`m use ChatManager_3.6.4 plugin

In your ChatManager config, add %simpleclans_clan_color_tag% to where you need the tag.
Something like:
Default_Format: "&8[&7Default&8] &7{player} %simpleclans_clan_color_tag% &9> &7{message}"

You need PlaceholderAPI for that.