If an entry ids alias is used in the crossref of another entry, it is added to the bibliography regardless of mincrossrefs.

Consider the following example:

\begin{filecontents}{\jobname.bib}
@incollection{incoll,
  author    =   {Claus, Santa},
  title     =   {The Aerodynamics of Modern the Modern Sleigh},
  pages     =   {34--98},
  crossref  =   {coll}}
@collection{collect,
  ids       =   {coll},
  title     =   {Airborne Gift Distribution: Technical Considerations},
  editor    =   {Nicholas, Saint},
  year      =   2013,
  publisher =   {Rudolph Press},
  address   =   {Greenland}}
\end{filecontents}
\documentclass{article}
\usepackage[mincrossrefs=6]{biblatex}
\bibliography{\jobname}
\begin{document}

\Textcite{incoll}.

\printbibliography

\end{document}

I would expect this to yield a single bibliography entry, whereas I actually get two (output).

Ref.: http://tex.stackexchange.com/questions/354567/saint-nicholass-airborne-gift-distribution-can-biblatex-biber-respect-mincross

plk / biber

If an entry ids alias is used in the crossref of another entry, it is added to the bibliography regardless of mincrossrefs. #161