Glossaries include symbol from other glossary in name

Glossaries include symbol from other glossary in name

I have a glossary entry which defines a symbol
\newglossaryentry{nc:line:num}{
    name=cache lines,
    symbol=\ensuremath{\#l},
    description=number of lines in cache}
and want to use its symbol in another entry inside a second glossary. Therefore I try:
\newglossaryentry{cache:swayassociative}{
    name={\glsentrysymbol{nc:line:num}-way associative},
    description={\nopostdesc},
    parent={cache},
    see={nc:line:num}
however this puts the code into the output, rather than the actual symbol.

As a bonus I am unsure how to properly right align the numbers and place the "see XXX" text properly, so that they don't overlap. (I am using the mcolalttreegroup style).
P.S.: I am trying to use glossaries for an index here, maybe it is not quite the right tool for the job, but since I actually use it for real glossaries as well, I thought it would not hurt to use a tool I am fairly familiar with (considering I am a novice and have no experience with makeidx).