[web-animations-1] Fix composite cross-links

Author: birtles

web-animations-1/Overview.bs

@@ -3485,11 +3485,11 @@ effect</a>'s <a lt="target property">target properties</a>.
 Since it is possible for multiple <a>in effect</a> <a>keyframe effects</a> to
 target the same property it is often necessary to combine the results of several
 <a>keyframe effects</a> together.
-This process is called <dfn lt='composition'>compositing</dfn> and is
-based on establishing an <a>effect stack</a> for each property
+This process is called <dfn lt='composite | composition'>compositing</dfn>
+and is based on establishing an <a>effect stack</a> for each property
 targeted by an <a>in effect</a> <a>animation effect</a>.
 
-After compositing the results of <a>keyframe
+After [=compositing=] the results of <a>keyframe
 effects</a> together, the composited result is combined with other
 values specified for the <a>target property</a>.
 
@@ -3555,8 +3555,10 @@ by one or more <a>keyframe effects</a> is an <dfn>effect
 stack</dfn> that establishes the relative composite order of the <a>keyframe
 effects</a>.
 
-The relative <dfn export>composite order</dfn> of any two <a>keyframe
-effects</a>, <var>A</var> and <var>B</var>, within an <a>effect stack</a> is
+The relative
+<dfn lt="animation composite order" local-lt="composite order" export>composite order</dfn>
+of any two <a>keyframe effects</a>, <var>A</var> and <var>B</var>,
+within an <a>effect stack</a> is
 established by comparing their properties as follows:
 
 1.  Let the <dfn>associated animation of an animation effect</dfn>