The ball bounces in the way of the animal! (7)
I believe the answer is:
'the animal' is the definition.
(thesaurus)
'the ball bounces in the way' is the wordplay.
'bounces' indicates an anagram (I've seen 'bouncing' mean this).
'in the' indicates putting letters inside.
'ball' anagrammed gives 'llab'.
'llab' going into 'way' is 'WALLABY'.
'of' is the link.
(Other definitions for wallaby that I've seen before include "Native antipodean marsupial" , "Kangaroo-like creature" , "One like small kangaroo" , "Bounder" , "rugby international" .)