I'm struggling with the parsing for these, help much appreciated.....
5d Edge held by companion (4) - INCH (Edge)
Companion = CH but I can't think of an example where 'Held' or 'Held by' can be substituted for IN.
18a Light shows mass in space almost fades away (8) - COMEDIES (Light shows)
I assume 'Mass' = M and 'Fades away' = DIES but I can't get the rest.