Given the many similar questions on TeX.SE, my desired answer may be somewhere else on this site, but I have not been able to find it -- apologies if this is a duplicate!
I am writing the following in my document.
In this section, we introduce the concept of \textit{information percolation}, as introduced by Lubetzky and Sly.
The rough idea will be to separate the state space in `clusters', which will then be coloured \RED, \BLUE\ or \GREEN (at time $t$) according to the following (rough) conditions:
\smallskip
\noindent%
\parbox{2em}{\raggedleft\bcdot\,}
\parbox{\linewidth-2em}{%
the \RED\ clusters will be the vertices whose states depend on the initial configuration;}
\noindent%
\parbox{2em}{\raggedleft\bcdot\,}
\parbox{\linewidth-2em}{%
the \BLUE\ clusters will be singletons with votes that are iid $\Unif([q])$ random variables;}
\noindent%
\parbox{2em}{\raggedleft\bcdot\,}
\parbox{\linewidth-2em}{%
the \GREEN\ clusters will be independent of the initial state, but have highly nontrivial dependencies inside the clusters -- it is the green clusters that embody the complicated correlation-nature of the voting model.}
\smallskip
A formal definition is forthcoming.
Here \bcdot is simply \ensuremath{\bm{\cdot}}, using the 'bold maths' package \bm.
This gives the following output.
This is in essence my version of an \itemise, use with spacing that I prefer. However, as you may have noticed, there are a few issues:
- the spacing between the second and third lines is too small;
- (most importantly) the bullet is in the centre of the three lines (horizontally), instead of inline with the top one.
How can I fix these two? -- namely, get the spacing unified and get the bullet on the top line?

label={\bcdot}instead of using\renewcommand. Also, for future reference, it is best to always provide a complete MWE including\documentclassand the appropriate packages in questions and answers. – Peter Grill Nov 21 '18 at 19:07\label={\bcdot}is far preferable! I tried something similar but it didn't work, so just used the\renewcommand. Also, I've just changed it to be in the form of a MWE. Thanks! – Sam OT Nov 21 '18 at 19:33