Nested Relationships

If you need to access a Playa field from within another Playa field, the only way to go about that is through an embedded template:

Parent Template

<h4>My Favorite Bands</h4>
<ol>
  {embed=bands/_members entry_ids="{favorite_bands:entry_ids}"}
</ol>

Child Template (bands/_members)

{exp:channel:entries channel="bands" fixed_order="{embed:entry_ids}"}
  <li>
    <h5>{title}</h5>
    <p>{band_desc}</p>
  
    <h6>Band Members</h6>
    <ul>
      {members}
        <li>{title}</li>
      {/members}
    </ul>
  </li>
{/exp:channel:entries}