§133

Clarity is not achieved by refining or completing the system of rules in language. Wittgenstein has already argued that we can get by perfectly well using words that aren't bound everywhere by rules (just as tennis works perfectly well even though there aren't rules governing every aspect) - and the rules can be said to be complete when they achieve the purpose we have for them (they don't need to be continually supplemented by other rules unless the need arises - unless somebody is unclear about the correct use(s) of an expression).
Philosophy has previously misconceived its tasks - seeking essences/de re necessities, or trying to provide an indubitable foundation for knowledge. As long as philosophy is misconceived it can always be brought into question. Wittgenstein has now provided us with methods which allow us to dissolve philosophical problems (conceptual confusions) as they arise.
One way in which philosophy has been misconceived is in thinking of philosophical problems as woven into a complete system or theory - and so undermining one aspect of a system/theory would put the rest into doubt. Wittgenstein now thinks of philosophical problems as more isolated (although presumably some conceptual confusions are intimately related to others) - they can be dissolved in a piecemeal manner.