Since I haven't seen any responses to my question as to which field is most appropriate for the name of a composition, I did some experimenting. (I figured it be better to experiment before I get too much entered.)

In Custom Fields, I created a 'Composition' field under 'Custom Page 1' and checked the 'Per-track setting' checkbox. At first I thought it might be just the answer, but then discovered that in the left panel's Tree View each and every composition, regardless of the composer, was appearing under each and every composer. Not good.

So I tried removing the check for 'Per-track setting'. No difference.

Is there any way to have a custom field that is a child of the 'Composer' field, having a one (Composer) to many (custom field) relationship?

I see from other discussions that this is a common-enough problem for classical music fans. Surely there must be some ideas on the best way to handle this very important need!