Manually place a clef object?

[Peter Kaplan]

When a repeated section begins in one clef and ends in another (as in the Basso
Continuo part I'm working on), it would be nice to be able to add a "reminder"
clef at the end of the repeated section, to alert the player to return to the
original clef when the repeat sign is reached.  

This behavior is easy to implement when the repeated section comes at the end of
the score; a simple \clef tenor can be placed after the final note and the tenor
clef will appear between the final note and the end of the bar -- perfect.

However, when the repeated section does not come at the end of the score, this
same fix fails.  Lilypond instead looks to see if there are any notes following
the reminder clef, finds none, and omits the reminder clef when engraving.  Is
there an alternative way to manually place a clef object for use in such cases?

Snippet can be found at http://pefty.elementfx.com/audio/snippet.ly