§90

Our investigation (the Wittgensteinian conception of philosophy/the investigation into the concept of time) is not directed at phenomena (the things we experience in the world) - it isn't empirical. What we do is call to mind "the kinds of statement that we make about phenomena".
The query about time and other philosophical problems are grammatical (Wittgenstein is using the term 'grammar/grammatical' is a slightly idiosyncratic way here). We clear away/dissolve problems by exposing misleading analogies (is the misleading analogy in this case thinking of time as analogous to space? - We talk about something taking a certain length of time, etc.) - or by substituting one form of expression for another. Is Wittgensteinian philosophy 'conceptual analysis'? - Not really, although sometimes the procedure of substituting one form of expression for another resembles taking a thing apart (Wittgenstein clearly rejects the kind of analysis engaged in by the likes of Russell).